2) 3 + 2 + 6 = 14) 9 + 6 + 2 = 3) 7 + 2 + 1 = 15) 5 + 8 ...

[Pages:2]Name

Date

ADDITION FACTS TO 20 SHEET 5

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

1) 1 + 4 + 5 = 2) 3 + 2 + 6 = 3) 7 + 2 + 1 = 4) 12 + 3 + 2 = 5) 10 + 3 + 3 = 6) 7 + 4 + 2 = 7) 4 + 5 + 6 = 8) 10 + 2 + 5 = 9) 4 + 8 + 2 = 10) 11 + 3 + 2 = 11) 5 + 5 + 4 = 12) 7 + 2 + 6 =

13) 13 + 5 + 1 = 14) 9 + 6 + 2 = 15) 5 + 8 + 3 = 16) 2 + 9 + 8 = 17) 6 + 2 + 4 = 18) 9 + 3 + 5 = 19) 2 + 12 + 4 = 20) 7 + 5 + 3 = 21) 6 + 10 + 2 = 22) 4 + 6 + 7 = 23) 2 + 11 + 4 = 24) 8 + 7 + 3 =

What happens to the answer when you change the order of the addends?

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ADDITION FACTS TO 20 SHEET 5 ANSWERS

Practice adding 3 single digit numbers mentally.

1) 1 + 4 + 5 = 10 13) 13 + 5 + 1 = 19

2) 3 + 2 + 6 = 11 14) 9 + 6 + 2 = 17

3) 7 + 2 + 1 = 10 15) 5 + 8 + 3 = 16

4) 12 + 3 + 2 = 17 16) 2 + 9 + 8 = 19

5) 10 + 3 + 3 = 16 17) 6 + 2 + 4 = 12

6) 7 + 4 + 2 = 13 18) 9 + 3 + 5 = 17

7) 4 + 5 + 6 = 15 19) 2 + 12 + 4 = 18

8) 10 + 2 + 5 = 17 20) 7 + 5 + 3 = 15

9) 4 + 8 + 2 = 14 21) 6 + 10 + 2 = 18

10) 11 + 3 + 2 = 16 22) 4 + 6 + 7 = 17

11) 5 + 5 + 4 = 14 23) 2 + 11 + 4 = 17

12) 7 + 2 + 6 = 15 24) 8 + 7 + 3 = 18

What happens to the answer when you change the order of the addends?

The answer stays the same.

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