8. Addition and subtraction

Subtract to find the difference.

We need to

• Add (+)

• Subtract (-)

Subtract to find the difference.

We need to

• Add

• Subtract

Choose + or - to show if you should ask or subtract.

• +

• -

Choose + or - to show if you should ask or subtract.

• +

• -

You need to

• Add

• Subtract

• 20

• 16

• 10

• 6

• 2

• 8

• 12

• 14

• 7

• 9

• 11

• 13