Subtracting 1-20 with Number Line

Which type of counting is used in subtraction?

• Forward counting

• Backward Counting

Subtract using the number line.

20 - 10 = _____

• 11

• 10

Subtract using the number line.

19 - 6 = _____

• 11

• 13

Subtract using the number line.

10 - 9 = _____

• 4

• 1

Subtract using the number line.

16 - 2 = _____

• 14

• 12

Subtract using the number line.

13 - 2 = _____

• 11

• 10

Subtract using the number line.

11 - 7 = _____

• 4

• 7

Subtract using the number line.

10 - 8 = _____

• 9

• 2

Subtract using the number line.

20 - 4 = ______

• 13

• 16

Subtract using the number line.

8 - 5 = _____

• 3

• 14