Addition and Subtraction (Review 3)

642 people were at Botanical Gardens on Monday.

122 fewer people were at Botanical Gardens on Tuesday.

How many people were at the Botanical Gardens on Tuesday?

What concept is this - part-whole or comparison?

• Part- whole concept

• Comparison concept

Answer explanation

Comparison concept because we see the comparison words

fewer than

We are comparing Monday and Tuesday

642 people were at Botanical Gardens on Monday.

122 fewer people were at Botanical Gardens on Tuesday.

How many people were at the Botanical Gardens on Tuesday?

Answer explanation

Fewer people visited on Tuesday

642 - 122 = 520

Ahmad sold 184 apple tarts.

He also sold 301 lemon tarts.

How many tarts did he sell altogether?

What concept is this - part-whole or comparison?

• Part- whole concept

• Comparison concept

Answer explanation

Part-whole concept because there is no need to compare.

P1 - apple tarts, P2 - lemon tarts

and we need to find the whole

Ahmad sold 184 apple tarts.

He also sold 301 lemon tarts.

How many tarts did he sell altogether?

Answer explanation

to find total, we add.

184 + 301 = 485

Cathy had some pencils.

She bought 20 new pencils.

She now has 30 pencils altogether.

How many pencils did she have at first?

What concept is this - part-whole or comparison?

• Part- whole concept

• Comparison concept

Answer explanation

Part-whole concept because there is no need to compare.

P1 - what she had at first,

P2 - bought 20 new pencils

Whole - 30 pencils now

Cathy had some pencils.

She bought 20 new pencils.

She now has 30 pencils altogether.

How many pencils did she have at first?

Answer explanation

P1 - what she had at first,

P2 - bought 20 new pencils

Whole - 30 pencils now

She had fewer pencils at first.

30 - 20 = 10