CBSE Class 3 Mathematics Practice Worksheet Set 01

Fill in the blanks :

Question 1. The standard unit of measure of length is _________________.
Answer: metre
In simple words: Metre is the basic unit used to measure length or distance.

Exam Tip: Remember that length can also be measured in centimetres and kilometres, but the standard SI unit is metre.

Question 2. 1 kilometer = _________________ meter.
Answer: 1000
In simple words: One thousand metres make one complete kilometre.

Exam Tip: The prefix 'kilo' always means 1000 times the base unit.

Question 3. 1 Meter = _________________ centimeter.
Answer: 100
In simple words: One hundred centimetres make one metre.

Exam Tip: The prefix 'centi' means one-hundredth, so 100 centimetres equal 1 metre.

Question 4. The standard unit for measuring weight is _________________.
Answer: kilogram
In simple words: Kilogram is the standard unit used to measure how heavy an object is.

Exam Tip: Weight is commonly measured in kilograms and grams.

Question 5. 1 kilogram = _________________ gram
Answer: 1000
In simple words: One thousand grams make one kilogram.

Exam Tip: Use the conversion factor \(1\text{ kg} = 1000\text{ g}\) for solving weight problems.

Question 6. The weight of an object is expressed in _________________ or grams.
Answer: kilograms
In simple words: Heavy objects are measured in kilograms and lighter ones in grams.

Exam Tip: Always check whether the question asks for kilograms or grams.

Question 7. The smaller unit of weight is _________________.
Answer: gram
In simple words: Gram is used to measure light items like a pencil or an eraser.

Question 8. The bigger unit of weight is _________________.
Answer: kilogram
In simple words: Kilogram is used to measure heavier items like bags of rice or fruits.
Exam Tip: Kilogram is larger than gram.

Question 9. The kilometre, metre and centimetre are the units of _________________.
Answer: length
In simple words: All these units measure how long or far something is.

Exam Tip: Associate kilometre, metre, and centimetre strictly with length.

Question 10. The standard unit for measuring capacity is _________________.
Answer: litre
In simple words: Litre is the standard unit to measure liquids.

Exam Tip: Capacity tells us how much liquid a container can hold.

Question 11. Capacity is measured in terms of ______________ and _______________.
Answer: litres, millilitres
In simple words: Liquids are measured using litres for larger quantities and millilitres for smaller quantities.

Exam Tip: Remember both units when describing liquid volumes.

Question 12. 1 liter = _________________ milliliter.
Answer: 1000
In simple words: One thousand millilitres make one litre.

Exam Tip: Use \(1\text{ l} = 1000\text{ ml}\) for all capacity conversions.

Question 13. 1 day = _________________ hours.
Answer: 24
In simple words: A full day and night cycle consists of 24 hours.

Exam Tip: Time conversion factor for days to hours is 24.

Question 14. 1 hour = _________________ minutes.
Answer: 60
In simple words: One hour is divided into 60 equal minutes.

Exam Tip: The minute hand completes one full circle in 60 minutes.

Question 15. 1 minute = _________________ seconds.
Answer: 60
In simple words: One minute contains 60 seconds.

Question 16. 1 week = _________________ days.
Answer: 7
In simple words: There are 7 days in a single week from Monday to Sunday.
Exam Tip: Remember the 7 days of the week: Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday.

Question 17. 1 year = _________________ months.
Answer: 12
In simple words: A year has 12 months starting from January to December.

Exam Tip: Count the months from January (1) to December (12).

Question 18. 1 year = _________________ days.
Answer: 365
In simple words: A normal calendar year has 365 days.

Exam Tip: Do not confuse a normal year (365 days) with a leap year (366 days).

Question 19. 1 leap year = _________________days.
Answer: 366
In simple words: A leap year occurs once every 4 years and has one extra day in February, making it 366 days.

Exam Tip: A leap year has 366 days because February has 29 days instead of 28.

Question 20. The short hand in a clock is the _________________ hand.
Answer: hour
In simple words: The shorter hand on the clock face tells us the hour.

Exam Tip: Short hand = Hour hand.

Question 21. The long hand in a clock is the _________________ hand.
Answer: minute
In simple words: The longer hand on the clock face tells us the minutes.

Exam Tip: Long hand = Minute hand.

Question 22. The hour hand completes _________________ rounds in a day.
Answer: 2
In simple words: Since a day has 24 hours and the clock face goes up to 12, the hour hand goes around twice in 24 hours.

Exam Tip: \(24 \div 12 = 2\) rounds per day.

Question 23. The hour hand takes _________________ hours to complete one round.
Answer: 12
In simple words: It takes 12 hours for the short hand to go all the way around the clock.

Exam Tip: One full circle of the hour hand covers 12 hours.

Question 24. The minute hand takes _________________ hours to complete one round.
Answer: 1 (or \(\frac{1}{2}\) hour / 1 hour)
In simple words: The minute hand takes 1 hour (or 60 minutes) to complete one full round.

Question 25. The minute hand completes _________________ round in a day.
Answer: 24
In simple words: Since there are 24 hours in a day, the minute hand completes 24 full rounds (one round every hour).
Exam Tip: 24 hours in a day means 24 rounds for the minute hand.

II DO AS DIRECTED : Add the following measurements

Question II.1.
m. cm.
25 80
+ 37 95
=======
Answer:
Centimetres: \(80 + 95 = 175\text{ cm} = 1\text{ m } 75\text{ cm}$
Metres: \(25 + 37 + 1 = 63\text{ m}$
Final Answer: 63 m. 75 cm.
In simple words: Add centimetres first, carry over 1 metre when it crosses 100 cm, then add the metres.

Exam Tip: Always add centimetres first and carry over the excess to the metre column.

Question II.2.
m. cm.
42 95
+ 39 80
=======
Answer:
Centimetres: \(95 + 80 = 175\text{ cm} = 1\text{ m } 75\text{ cm}$
Metres: \(42 + 39 + 1 = 82\text{ m}$
Final Answer: 82 m. 75 cm.
In simple words: Add cm columns and carry over 1 to the metre column.

Exam Tip: Double check your addition in the cm column.

Question II.3.
m. cm.
98 27
+ 65 88
=======
Answer:
Centimetres: \(27 + 88 = 115\text{ cm} = 1\text{ m } 15\text{ cm}$
Metres: \(98 + 65 + 1 = 164\text{ m}$
Final Answer: 164 m. 15 cm.
In simple words: Sum the centimetres to 115, write down 15 and carry 1 to metres. Then add the metres.

Exam Tip: Remember \(100\text{ cm} = 1\text{ m}\).

Question II.4.
m. cm.
57 26
+ 48 68
=======
Answer:
Centimetres: \(26 + 68 = 94\text{ cm}$
Metres: \(57 + 48 = 105\text{ m}$
Final Answer: 105 m. 94 cm.
In simple words: Since cm sum is 94 (less than 100), no carry over is needed. Add metres normally.

Exam Tip: Only carry over to metres if centimetres are 100 or more.

Question II.5.
m. cm.
99 45
+ 27 60
=======
Answer:
Centimetres: \(45 + 60 = 105\text{ cm} = 1\text{ m } 05\text{ cm}$
Metres: \(99 + 27 + 1 = 127\text{ m}$
Final Answer: 127 m. 05 cm.
In simple words: 45 + 60 = 105 cm, which gives 1 m and 5 cm. Carry 1 to the metres.

Exam Tip: Write 5 cm as 05 cm to maintain two digit format.

Question II.6.
m. cm.
195 76
+ 55 22
=======
Answer:
Centimetres: \(76 + 22 = 98\text{ cm}$
Metres: \(195 + 55 = 250\text{ m}$
Final Answer: 250 m. 98 cm.
In simple words: Add centimetres (98) and metres (250) directly since sum of cm is below 100.

Question II.7.
m. cm.
155 96
+ 87 53
=======
Answer:
Centimetres: \(96 + 53 = 149\text{ cm} = 1\text{ m } 49\text{ cm}$
Metres: \(155 + 87 + 1 = 243\text{ m}$
Final Answer: 243 m. 49 cm.
In simple words: 96 + 53 = 149 cm, write 49 and carry 1 metre over.
Exam Tip: Take care with multi-digit addition in metres.

Question II.8.
kg. g.
63 910
+ 90 628
========
Answer:
Grams: \(910 + 628 = 1538\text{ g} = 1\text{ kg } 538\text{ g}$
Kilograms: \(63 + 90 + 1 = 154\text{ kg}$
Final Answer: 154 kg. 538 g.
In simple words: Add grams, carry 1 kg since 1538 grams is more than 1000 grams.

Exam Tip: \(1000\text{ g} = 1\text{ kg}\), so carry over 1 when grams exceed 999.

Question II.9.
kg. g.
44 738
+ 65 927
========
Answer:
Grams: \(738 + 927 = 1665\text{ g} = 1\text{ kg } 665\text{ g}$
Kilograms: \(44 + 65 + 1 = 110\text{ kg}$
Final Answer: 110 kg. 665 g.
In simple words: Sum of grams is 1665, write 665 and carry 1 to kilograms.

Exam Tip: Ensure proper column alignment for grams and kilograms.

Question II.10.
kg. g.
78 285
+ 31 946
========
Answer:
Grams: \(285 + 946 = 1231\text{ g} = 1\text{ kg } 231\text{ g}$
Kilograms: \(78 + 31 + 1 = 110\text{ kg}$
Final Answer: 110 kg. 231 g.
In simple words: Add grams to get 1231, carry 1 kg and add kilograms.

Exam Tip: Double check the addition of the gram values.

Question II.11.
l. ml.
85 192
+ 63 579
========
Answer:
Millilitres: \(192 + 579 = 771\text{ ml}$
Litres: \(85 + 63 = 148\text{ l}$
Final Answer: 148 l. 771 ml.
In simple words: Sum of millilitres is 771 (less than 1000), so no carry over. Add litres directly.

Exam Tip: Check if millilitres exceed 1000 before deciding on carry over.

Question II.12.
l. ml.
173 460
+ 200 875
========
Answer:
Millilitres: \(460 + 875 = 1335\text{ ml} = 1\text{ l } 335\text{ ml}$
Litres: \(173 + 200 + 1 = 374\text{ l}$
Final Answer: 374 l. 335 ml.
In simple words: 460 + 875 = 1335 ml, which is 1 litre and 335 millilitres. Carry 1 to litres.

Exam Tip: \(1000\text{ ml} = 1\text{ l}\).

III Subtract

Question III.1.
m. cm.
78 37
- 29 17
=======
Answer:
Centimetres: \(37 - 17 = 20\text{ cm}$
Metres: \(78 - 29 = 49\text{ m}$
Final Answer: 49 m. 20 cm.
In simple words: Subtract cm from cm and m from m directly.

Exam Tip: Subtraction is straightforward when top cm is greater than bottom cm.

Question III.2.
m. cm.
64 20
- 25 65
=======
Answer:
Centimetres: Since \(20 < 65\), borrow 1 m (\(100\text{ cm}\)) from 64 m.
New cm: \(20 + 100 = 120\text{ cm}\), minus \(65 = 55\text{ cm}$
Metres: \(63 - 25 = 38\text{ m}$
Final Answer: 38 m. 55 cm.
In simple words: Borrow 1 metre (= 100 cm) because 20 is smaller than 65.

Exam Tip: Always borrow 100 cm when the top centimetre value is smaller than the bottom.

Question III.3.
m. cm.
50 34
- 27 65
=======
Answer:
Centimetres: Borrow 1 m (\(100\text{ cm}\)), so \(34 + 100 = 134\text{ cm}\).
\(134 - 65 = 69\text{ cm}$
Metres: \(49 - 27 = 22\text{ m}$
Final Answer: 22 m. 69 cm.
In simple words: Borrow 1 metre to make 134 cm, then subtract 65 cm to get 69 cm.

Exam Tip: Reduce the metre count by 1 after borrowing.

Question III.4.
kg. g.
25 682
- 18 345
========
Answer:
Grams: \(682 - 345 = 337\text{ g}$
Kilograms: \(25 - 18 = 7\text{ kg}$
Final Answer: 7 kg. 337 g.
In simple words: Subtract grams and kilograms directly.

Question III.5.
kg. g.
87 532
- 49 723
========
Answer:
Grams: Since \(532 < 723\), borrow 1 kg (\(1000\text{ g}\)) from 87 kg.
New grams: \(532 + 1000 = 1532\text{ g}\), minus \(723 = 809\text{ g}$
Kilograms: \(86 - 49 = 37\text{ kg}$
Final Answer: 37 kg. 809 g.
In simple words: Borrow 1 kg (= 1000 g) to make 1532 g before subtracting.
Exam Tip: When borrowing for weight, add 1000 to the gram column.

Question III.6.
kg. g.
95 720
- 36 980
========
Answer:
Grams: Borrow 1 kg (\(1000\text{ g}\)), so \(720 + 1000 = 1720\text{ g}\).
\(1720 - 980 = 740\text{ g}$
Kilograms: \(94 - 36 = 58\text{ kg}$
Final Answer: 58 kg. 740 g.
In simple words: Borrow 1 kg, add 1000 to 720, then subtract 980.

Exam Tip: Always decrease the kg value by 1 after borrowing.

Question III.7.
l. ml.
38 950
- 21 250
========
Answer:
Millilitres: \(950 - 250 = 700\text{ ml}$
Litres: \(38 - 21 = 17\text{ l}$
Final Answer: 17 l. 700 ml.
In simple words: Subtract ml and l directly since 950 is greater than 250.

Exam Tip: Direct subtraction is possible when top values are larger.

Question III.8.
l. ml.
78 065
- 35 425
========
Answer:
Millilitres: Since \(065 < 425\), borrow 1 l (\(1000\text{ ml}\)) from 78 l.
New ml: \(65 + 1000 = 1065\text{ ml}\), minus \(425 = 640\text{ ml}$
Litres: \(77 - 35 = 42\text{ l}$
Final Answer: 42 l. 640 ml.
In simple words: Borrow 1 litre (= 1000 ml) to make 1065 ml, then subtract 425 ml.

Exam Tip: Pay attention to leading zeros like 065 ml.

Question III.9.
l. ml.
50 275
- 36 436
========
Answer:
Millilitres: Borrow 1 l (\(1000\text{ ml}\)), so \(275 + 1000 = 1275\text{ ml}\).
\(1275 - 436 = 839\text{ ml}$
Litres: \(49 - 36 = 13\text{ l}$
Final Answer: 13 l. 839 ml.
In simple words: Borrow 1 litre, add 1000 to 275, then subtract 436.

Exam Tip: Remember to subtract 1 from the litre column after borrowing.

IV Convert into Centimetres

Question IV.1. 5 m
Answer: \(5 \times 100 = 500\text{ cm}$
In simple words: Multiply the number of metres by 100 to get centimetres.

Exam Tip: \(1\text{ m} = 100\text{ cm}\).

Question IV.2. 8 m
Answer: \(8 \times 100 = 800\text{ cm}$
In simple words: Multiply 8 by 100.

Exam Tip: Add two zeros to convert metres to centimetres.

Question IV.3. 10 m
Answer: \(10 \times 100 = 1000\text{ cm}$
In simple words: Multiply 10 by 100.

Exam Tip: \(10 \times 100 = 1000\).

Question IV.4. 25 m
Answer: \(25 \times 100 = 2500\text{ cm}$
In simple words: Multiply 25 by 100.

Exam Tip: Attach two zeros to 25.

Question IV.5. 1 m
Answer: \(1 \times 100 = 100\text{ cm}$
In simple words: 1 metre is equal to 100 centimetres.

Exam Tip: Basic unit conversion rule.

Question IV.6. 15 m
Answer: \(15 \times 100 = 1500\text{ cm}$
In simple words: Multiply 15 by 100.

Exam Tip: \(15\text{ m} = 1500\text{ cm}\).

V Convert into metres

Question V.1. 9 km
Answer: \(9 \times 1000 = 9000\text{ m}$
In simple words: Multiply kilometres by 1000 to convert to metres.

Exam Tip: \(1\text{ km} = 1000\text{ m}\).

Question V.2. 16 km
Answer: \(16 \times 1000 = 16000\text{ m}$
In simple words: Multiply 16 by 1000.

Exam Tip: Add three zeros to convert km to m.

Question V.3. 35 km
Answer: \(35 \times 1000 = 35000\text{ m}$
In simple words: Multiply 35 by 1000.

Exam Tip: \(35\text{ km} = 35000\text{ m}\).

Question V.4. 8 km
Answer: \(8 \times 1000 = 8000\text{ m}$
In simple words: Multiply 8 by 1000.

Exam Tip: \(8\text{ km} = 8000\text{ m}\).

Question V.5. 10 km
Answer: \(10 \times 1000 = 10000\text{ m}$
In simple words: Multiply 10 by 1000.

Exam Tip: \(10\text{ km} = 10000\text{ m}\).

Question V.6. 13 km
Answer: \(13 \times 1000 = 13000\text{ m}$
In simple words: Multiply 13 by 1000.

Exam Tip: \(13\text{ km} = 13000\text{ m}\).

VI Convert into grams

Question VI.1. 6 kg
Answer: \(6 \times 1000 = 6000\text{ g}$
In simple words: Multiply kilograms by 1000 to convert to grams.

Exam Tip: \(1\text{ kg} = 1000\text{ g}\).

Question VI.2. 8 kg
Answer: \(8 \times 1000 = 8000\text{ g}$
In simple words: Multiply 8 by 1000.

Exam Tip: \(8\text{ kg} = 8000\text{ g}\).

Question VI.3. 12 kg
Answer: \(12 \times 1000 = 12000\text{ g}$
In simple words: Multiply 12 by 1000.

Exam Tip: \(12\text{ kg} = 12000\text{ g}\).

Question VI.4. 15 kg
Answer: \(15 \times 1000 = 15000\text{ g}$
In simple words: Multiply 15 by 1000.

Exam Tip: \(15\text{ kg} = 15000\text{ g}\).

Question VI.5. 23 kg
Answer: \(23 \times 1000 = 23000\text{ g}$
In simple words: Multiply 23 by 1000.

Exam Tip: \(23\text{ kg} = 23000\text{ g}\).

Question VI.6. 45 kg
Answer: \(45 \times 1000 = 45000\text{ g}$
In simple words: Multiply 45 by 1000.

Exam Tip: \(45\text{ kg} = 45000\text{ g}\).

VII Convert into millilitres

Question VII.1. 5 l
Answer: \(5 \times 1000 = 5000\text{ ml}$
In simple words: Multiply litres by 1000 to convert to millilitres.

Exam Tip: \(1\text{ l} = 1000\text{ ml}\).

Question VII.2. 15 l
Answer: \(15 \times 1000 = 15000\text{ ml}$
In simple words: Multiply 15 by 1000.

Exam Tip: \(15\text{ l} = 15000\text{ ml}\).

Question VII.3. 20 l
Answer: \(20 \times 1000 = 20000\text{ ml}$
In simple words: Multiply 20 by 1000.

Exam Tip: \(20\text{ l} = 20000\text{ ml}\).

7. Write the time in two ways. (Based on clock diagrams)

Question 7.1. Clock 1 (Hour hand pointing between 3 and 4, minute hand at 6)
Answer: 3:30 or Half past 3
In simple words: When the minute hand points at 6, it is 30 minutes past the hour.

Exam Tip: Minute hand at 6 means 30 minutes or half past.

Question 7.2. Clock 2 (Hour hand pointing at 9, minute hand at 12)
Answer: 9:00 or 9 o'clock
In simple words: When the minute hand is at 12, it is the exact hour.

Question 7.3. Clock 3 (Hour hand pointing past 1, minute hand at 3)
Answer: 1:15 or Quarter past 1
In simple words: When the minute hand is at 3, 15 minutes have passed, also called quarter past.

Exam Tip: Minute hand at 3 means 15 minutes past.

Question 7.4. Clock 4 (Hour hand pointing past 10, minute hand at 9)
Answer: 10:45 or Quarter to 11
In simple words: When the minute hand is at 9, 45 minutes have passed or it is 15 minutes before the next hour.

Exam Tip: Minute hand at 9 means quarter to the next hour.

Question 7.5. Clock 5 (Hour hand pointing at 4, minute hand at 12)
Answer: 4:00 or 4 o'clock
In simple words: Hour hand on 4 and minute hand on 12.

Exam Tip: Exact hour reading.

Question 7.6. Clock 6 (Hour hand pointing past 6, minute hand at 3)
Answer: 6:15 or Quarter past 6
In simple words: 15 minutes past 6.

Exam Tip: Minute hand at 3 = 15 minutes past.

Question 7.7. Clock 7 (Hour hand pointing past 2, minute hand at 6)
Answer: 2:30 or Half past 2
In simple words: 30 minutes past 2.

Exam Tip: Minute hand at 6 = half past.

Question 7.8. Clock 8 (Hour hand pointing past 11, minute hand at 9)
Answer: 11:45 or Quarter to 12
In simple words: 45 minutes past 11 or quarter to 12.

Exam Tip: Minute hand at 9 = quarter to.

Question 7.9. Clock 9 (Hour hand pointing at 7, minute hand at 12)
Answer: 7:00 or 7 o'clock
In simple words: Exact 7 o'clock.

Exam Tip: Minute hand at 12 = o'clock.

8. Write the time as a.m. or p.m.

Question 8.1. 8:20 in the morning.
Answer: 8:20 a.m.
In simple words: Morning time is expressed as a.m.

Exam Tip: a.m. stands for Ante Meridiem (from midnight to noon).

Question 8.2. 9:00 at night.
Answer: 9:00 p.m.
In simple words: Night time is expressed as p.m.

Exam Tip: p.m. stands for Post Meridiem (from noon to midnight).

Question 8.3. 12:30 after noon.
Answer: 12:30 p.m.
In simple words: Time right after noon is p.m.

Exam Tip: Noon itself is 12:00 noon, and just after noon is p.m.

Question 8.4. 5:45 in the evening.
Answer: 5:45 p.m.
In simple words: Evening time falls in the p.m. hours.

Exam Tip: Evening is always p.m.

Question 8.5. 4:05 after mid night.
Answer: 4:05 a.m.
In simple words: Time after midnight and before noon is a.m.

Exam Tip: Early morning hours are a.m.

Question 8.6. 10:40 before noon.
Answer: 10:40 a.m.
In simple words: Time before noon is a.m.

Exam Tip: 'Before noon' explicitly means a.m.

Question 8.7. 1 o’clock after mid night.
Answer: 1:00 a.m.
In simple words: One hour past midnight is a.m.

Exam Tip: Night hours heading toward morning are a.m.

Question 8.8. 7:15 in the evening.
Answer: 7:15 p.m.
In simple words: Evening time is p.m.

Question 8.9. 11:00 at night.
Answer: 11:00 p.m.
In simple words: Night hours are p.m.

Exam Tip: Night time before midnight is p.m.

Question 8.10. 1:35 after noon.
Answer: 1:35 p.m.
In simple words: Afternoon hours are p.m.

Exam Tip: After noon = p.m.