Mental Math- Adding Doubles

Front

5 + 5 = ?

Back

10

Front

9 + 9 = ?

Back

18

Front

40 + 40 = ?

Back

80

Front

2 + 2 = ?

Back

4

Front

33 + 33 = ?

Back

66

Front

What is adding doubles?

Back

Adding doubles means adding the same number to itself.

Front

What is the double of 3?

Back

6

Front

What is the double of 7?

Back

14

Front

What is the double of 10?

Back

20

Front

What is the double of 1?

Back

2