Grade 1 Adding Missing Addend Sum Under 20

Addition - missing addend (sums up to 20)

Grade 1 Addition Worksheet

What number should be added to the first number to make the answer?

1) 1 + = 1

2) 3 + = 11

3) 3 + = 5

4) 4 + = 6

5) 7 + = 16

6) 8 + = 16

7) 4 + = 17

8) 5 + = 8

9) 3 + = 3

10) 1 + = 2

11) 8 + = 11

12) 2 + = 8

13) 5 + = 10

14) 8 + = 20

15) 4 + = 13

16) 2 + = 6

17) 5 + = 11

18) 2 + = 3

19) 8 + = 12

20) 2 + = 5

Online reading & math for K-5



Addition - missing addend (sums up to 20)

Grade 1 Addition Worksheet

What number should be added to the first number to make the answer?

1) 1 + 0 = 1

2) 3 + 8 = 11

3) 3 + 2 = 5

4) 4 + 2 = 6

5) 7 + 9 = 16

6) 8 + 8 = 16

7) 4 + 13 = 17

8) 5 + 3 = 8

9) 3 + 0 = 3

10) 1 + 1 = 2

11) 8 + 3 = 11

12) 2 + 6 = 8

13) 5 + 5 = 10

14) 8 + 12 = 20

15) 4 + 9 = 13

16) 2 + 4 = 6

17) 5 + 6 = 11

18) 2 + 1 = 3

19) 8 + 4 = 12

20) 2 + 3 = 5

Online reading & math for K-5



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