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\ 26-Feb-2024 Bharat Arora Proof-6 Reader’s Sign _______________________ Date __________

3. First add the same numbers. then, add the remaining number to the sum.
(a) t O (b) t O (c) t O (d) t O

4 5 8 6
3 5 3 3
+ 4 + 7 + 3 + 6

CheCkING ADDITION

Till now we have learnt addition of numbers. Now, we will learn the method of
checking answers. It will help us know if the answer is correct. We use order property
for this checking.

example 1: Add 16, 37 and 8 and check example 2: Find the sum of 14, 18 and
the answer. 43.
Solution: Solution:

t O t O t O t O
2 2 1 1
1 6 8 1 4 4 3

3 7 Checking 3 7 1 8 Checking 1 8
+ 8 Same + 1 6 + 4 3 Same + 1 4
6 1 6 1 7 5 7 5

The answer is correct. The answer is correct.

Practice Time 2G

Find the sum. Then, check your answer using order property.
1. t O t O 2. t O t O 3. t O t O

6 1 7 1 2
1 2 3 3 9
+ 8 + + 1 4 + + 4 1 +

4. t O t O 5. t O t O 6. t O t O

2 6 1 7 2 7
1 8 2 6 3 6

+ 2 8 + + 4 3 + + 2 8 +

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