+1/-1

Front

1 + 1 = ___

Back

2

Front

1 + 13 = ___

Back

14

Front

8 - 1 = ___

Back

7

Front

12 - ___ = 11

Back

1

Front

15 - 1 = ___

Back

14

Front

What is +1?

Back

Adding one to a number.

Front

What is -1?

Back

Subtracting one from a number.

Front

If you have 5 and add 1, how many do you have?

Back

6

Front

If you have 10 and subtract 1, how many do you have?

Back

9

Front

What is the result of 0 + 1?

Back

1