How to use the exercise

Use the rule of - 1 to do the math

Score

________

Underline the Grade

A

B

C

1) 7 - 1 = ________


2) 4 - 1 = ________


3) 15 - 1 = ________


4) 10 - 1 = ________


5) 9 - 1 = ________


6) 88 - 1 = ________


7) 99 - 1 = ________


8) 69 - 1 = ________


9) 11 - 1 = ________


10) 22 - 1 = ________