Adding and Subtracting Tens

Front

What is adding tens?

Back

Adding tens means increasing a number by a multiple of ten. For example, if you add 20 to 30, you get 50.

Front

What is subtracting tens?

Back

Subtracting tens means decreasing a number by a multiple of ten. For example, if you subtract 10 from 50, you get 40.

Front

What is 30 + 20?

Back

30 + 20 = 50.

Front

What is 50 - 30?

Back

50 - 30 = 20.

Front

If you have 40 and you add 30, what do you get?

Back

40 + 30 = 70.

Front

If you have 80 and you subtract 20, what do you get?

Back

80 - 20 = 60.

Front

What is the result of 60 + 10?

Back

60 + 10 = 70.

Front

What is the result of 90 - 40?

Back

90 - 40 = 50.

Front

If you add 10 to 20, what is the answer?

Back

20 + 10 = 30.

Front

If you subtract 10 from 70, what do you get?

Back

70 - 10 = 60.