1-5 Count on and count back to subtract

Count back to subtract. Use a number line to help you.

6 – 4=........

• 5

• 3

• 2

• 4

Count back to subtract. Use a number line to help you.

15 – 7 = .........

• 8

• 9

• 7

• 10

Jack has 7 trading cards.

He gives 4 cards to Bart.

How many trading cards does Jack have now?

• 5

• 4

• 3

• 2

Which explains how to use a number line to find 9 – 5?

• Start at 9 and count back 5 moves until you reach 4

• Start at 9 and count up 5 moves until you reach 14

• Start at 5 and count back 4 moves until you reach 1

• Start at 5 and count up 9 moves until you reach 14

Lily has 17 blueberries

She eats some of the blueberries

Lily has 9 blueberries left. How many blueberries did Lily eat?

• 10 blueberries

• 9 blueberries

• 8 blueberries

• 7 blueberries