Adding and subtracting tens

Front

50 - 20 = ?

Back

30

Front

70 + 10 = ?

Back

80

Front

70 - 70 = ?

Back

0

Front

30 + 30 = ?

Back

60

Front

80 - 20 = ?

Back

60

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 do we call the result of addition?

Back

The result of addition is called the sum.

Front

What do we call the result of subtraction?

Back

The result of subtraction is called the difference.

Front

If you add 10 to 70, what do you get?

Back

80