CBSE Class 3 Mathematics Revision Worksheet Set 20

Question 1. Use information given below to fill in the blanks.
• The moon goes around the earth once in about 28 days.
• People weigh 6 times more on earth than they would on the moon.
• You can jump 6 times higher on the moon than on earth.
• Scientists believe that the moon does not have air and water.

a) The child who weighs 5 kg on the moon would weigh _________kg on the earth.
b) The child who weighs 12 kg on the moon will weigh_________kg on the earth.
c) It takes the moon _________days to go around the earth 10 times.
d) An astronaut who drinks 5 cups of water a day needs ________cup of water on a 25 day trip into space.
e) A child who can jump 75 cm on earth can jump __________cm on the moon.
Answer:
a) 30
b) 72
c) 280
d) 125
e) 450
In simple words: Use multiplication to find the answers. Multiply by 6 for weights and jumps, and multiply by the number of days for the other questions.

Exam Tip: Read the clues carefully. If you know how much a thing is for 1 day or on 1 place, multiply to find it for more days or another place.

Question 2. Build the 9 times table. 'TENDULKAR' is a surname with 9 letters. Write it continuously in a hundred grid. Colour the box everytime the name is complete(on R’s)
 

After observing the above table write the table of 9 in the given boxes.

Answer: See the completed tables above.
In simple words: Since "TENDULKAR" has 9 letters, the name ends on the letter 'R' at every multiple of 9. This builds the 9 times table.

Exam Tip: Notice that when you add the digits of any answer in the 9 times table, they always add up to 9 (for example, 1 + 8 = 9, 2 + 7 = 9).