Adding and subtracting double digits

Front

What is the sum of 10 + 10?

Back

20

Front

If you have 36 pencils and your friend has 10 pencils, how many pencils do you have together?

Back

46

Front

What is 77 - 26?

Back

51

Front

What is the sum of 11 + 11?

Back

22

Front

What is the difference between 50 and 30?

Back

20

Front

If you add 25 and 15, what do you get?

Back

40

Front

What is 90 - 45?

Back

45

Front

If you have 40 apples and you give away 15, how many apples do you have left?

Back

25

Front

What is 60 + 25?

Back

85

Front

What is the result of 100 - 37?

Back

63