Adding and Subtracting Multiples of 10

Front

79 - 40 = ?

Back

39

Front

81 - 30 = ?

Back

51

Front

28 + 40 = ?

Back

68

Front

91 - 60 = ?

Back

31

Front

49 + 20 = ?

Back

69

Front

What is addition?

Back

Addition is combining two or more numbers to get a total.

Front

What is subtraction?

Back

Subtraction is taking one number away from another.

Front

What does 'multiple of 10' mean?

Back

A multiple of 10 is any number that can be divided by 10 without a remainder, like 10, 20, 30.

Front

How do you add 10 to a number?

Back

You increase the number by 10. For example, 5 + 10 = 15.

Front

How do you subtract 10 from a number?

Back

You decrease the number by 10. For example, 15 - 10 = 5.