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Addition And subtrACtion stories

To solve a word problem, first we Keywords used

decide whether to add or subtract. Addition: in all, total, together, altogether, sum
Then we solve the problem Subtraction: more, less, left, difference, taking away
accordingly.

Example 1: 62 people are sitting in a hall. 20 more people join them. How many

people are there in all?

Solution: Keyword used: in all. tens Ones

This is an addition problem. 6 2
So, 62 + 20 = 82 people + 2 0

Thus, 82 people are there in the hall now. 8 2

Example 2: Siya had 36 ribbons. She gave

12 ribbons to Jiya. How many ribbons are left with Siya?

Solution: Keyword used: left. tens Ones
This is a subtraction problem. 3 6

So, 36 – 12 = 24 ribbons – 1 2

Thus, 24 ribbons are left with Siya. 2 4

Practice time 7H

Read the story sums and solve.
1. Lucky went to a grocery store. He tens Ones

bought 15 packs of cookies and 12
packs of noodles. How many packs of

groceries did he buy in all?

Ans. He bought ____ packs in all.

2. 63 birds are sitting on a tree. 11 birds tens Ones
fly away. How many birds are left on

the tree now?

Ans. There are ____ birds on the tree.

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