Solve Addition and Subtraction Problems

This activity is about word problems that require us to add and subtract, not just once, but perhaps several times.

 

When do we add numbers?

We add when:

We increase amounts

Someone gives us something extra

We get more of something

 

 

When do we subtract numbers?

We subtract when:

We decrease amounts

We give away something

We spend money

 

 

 

Example

There are 225 sweets in a jar.

Jack takes 35 sweets out of the jar.

Jane takes 15 fewer than Jack out of the jar.

 

How many sweets are left in the jar?

 

 

Answer

First, we work out how many sweets Jane takes.

This is 15 fewer than Jack. 

35 - 15 = 20

So Jane takes 20 sweets.

 

Sweets left in jar = 225 - 35 - 20 = 190 - 20 = 170 sweets

 

Are you ready to get started?