Adding within 20

Front

4+2

Back

6

Front

12 + 7

Back

19

Front

12+1

Back

13

Front

Is it true or false? 23+12=56

Back

False

Front

10+3=

Back

13

Front

15+4=

Back

19

Front

In the addition problem 18+2=20, what is the digit 20 called?

Back

sum

Front

In the addition problem 6+2=8, what are the digits 6 and 2 called?

Back

addends

Front

What is the sum of the addition problem 10+8=?

Back

18

Front

6 + 3 + 7

Back

16