Add And Subtract Tens

Front

What is adding tens?

Back

Adding tens means increasing a number by a value that is a multiple of ten, like 10, 20, or 30.

Front

What is subtracting tens?

Back

Subtracting tens means decreasing a number by a value that is a multiple of ten, like 10, 20, or 30.

Front

What is the number sentence for 100 minus 20?

Back

100 - 20 = 80.

Front

What is the number sentence for 30 minus 30?

Back

30 - 30 = 0.

Front

What is the difference between 100 and 50?

Back

The difference is 50.

Front

What is the number sentence for 70 minus 50?

Back

70 - 50 = 20.

Front

What is the number sentence for 70 minus 40?

Back

70 - 40 = 30.

Front

What is the number sentence for 70 minus 30?

Back

70 - 30 = 40.

Front

What is the number sentence for 70 minus 20?

Back

70 - 20 = 50.

Front

What is the number sentence for 40 plus 50?

Back

40 + 50 = 90.