# Math 1A Singapore-Making Subtraction Stories-Chapter 4.1

## Making Subtraction Stories

**
#There are 8 birds. 3 birds fly away. 5 birds are left.**

We write the number sentence:

8 – 3 = 5

This is subtraction.

It means taking away.

**#There are 7 children. 2 of them are girls. There are 5 boys.**

So, the number sentence is 7 – 2
= 5

**#There are 9 carrots altogether. The rabbits are eating 3
carrots. 6 carrots are left.**

So, the number sentence is 9 – 3
= 6

**1. Make up a story for each number sentence as below.**

(a) 5 – 1 = 4

(b) 9 – 3 = 6

(c) 6 – 4 = 2

(d) 6 – 6 = 0

**Solution:**

**(a)**

There are 5 frogs altogether.

1 frog jumps away.

4 frogs are left.

**(b)**

There are 9 fruits altogether.

3 of them are jackfruits.

There are 6 mangoes.

**(c)**

There are 6 children.

4 of them are boys.

There are 2 girls.

**(d)**

There are 6 birds.

6 birds fly away.

0 birds are left.

**2. Make up as many stories as you can for each number
sentence as below.**

(a) 7 – 3 =4

(b) 7 – 2 = 5

**Solution:**

**(a)**

There are 7 children in a swimming pool.

3 of them are girls.

There are 4 boys.

**(b) **

There are 7 children in a swimming pool.

2 children are walking away.

5 children are left.

**3. Make up as many subtraction stories as you can and write a
number sentence for each story.**

**Solution:**

**(a) **

There are 5 helicopters.

2 fly away.

3 helicopters are left.

**Number
sentence:** 5 – 2 = 3

[as per workbook exercise 20.1(a)]

**(b)**

There are 6 children.

2 walk away.

4 children are left.

**Number
Sentence:** 6 – 2 = 4

[as per workbook exercise 20.1(b)]

**(c)**

There are 7 boxes.

I take away 1 box.

6 boxes are left.

**Number
Sentence:** 7 – 1 = 6

[as per workbook exercise 20.1(c)]

**(d)**

There are 9 beads.

I take away 4.

5 beads are left.

**Number
sentence:** 9 – 4 = 5

[as per workbook exercise 20.1(d)]