CBSE Class 3 Mathematics Give And Take Worksheet Set 03

Question 1. Break the number and find the sum.
1) \(72 + 12 =\)
Answer:
Break 72 into 70 and 2.
Break 12 into 10 and 2.
Group tens together and ones together: \(70 + 10 = 80\), and \(2 + 2 = 4\).
Add the results: \(80 + 4 = 84\).
In simple words: Break both numbers into tens and ones, add the tens together, add the ones together, and then add those two sums to get the final answer.
Exam Tip: Always split numbers into tens and units (ones) to make mental addition much easier and faster.

Question 2. Break the number and find the sum.
2) \(62 + 38 =\)
Answer:
Break 62 into 60 and 2.
Break 38 into 30 and 8.
Group tens together: \(60 + 30 = 90\).
Group ones together: \(2 + 8 = 10\).
Add the partial sums: \(90 + 10 = 100\).
In simple words: Split both numbers into tens and ones, add them separately, and combine the totals.

Exam Tip: When the sum of ones equals 10 or more (like \(2 + 8 = 10\)), remember to carry it over properly to the tens place.

Question 3. Break the number and find the sum.
3) \(46 + 21 =\)
Answer:
Break 46 into 40 and 6.
Break 21 into 20 and 1.
Group tens together: \(40 + 20 = 60\).
Group ones together: \(6 + 1 = 7\).
Add the partial sums: \(60 + 7 = 67\).
In simple words: Separate the tens and ones parts, add tens to tens and ones to ones, then put them together.

Exam Tip: Double-check your addition of the ones digits to avoid careless calculation errors.

Competency : Problem Solving Ability

I. Add mentally and write the number:

1. 11 more than 20 _____________

2. 10 more than 49 ______________

3. The sum of 28 and 10 is _____________

4. 9 added to 41 gives _____________

5. 19 added to 7 gives _____________

6. 10 less than 100 is _____________

7. 12 less than 60 is _____________

8. Take away 20 from 70 _____________

9. Take away 15 from 75 _____________

10.Take away 7 from 7 _____________

11.76 less than 76 is _____________

12.19 less than 90 is _____________