Math Addition Facts to 20 - Free Printable

Let’s solve each addition problem step by step.

We’ll go one by one, adding the two numbers and writing the sum.

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

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

Now for the CHALLENGE:

We are given these numbers: 13, 7, 12, 4, 6
We need to pick 3 of them to make a true addition sentence: ___ + ___ = ___

Let’s try combinations:

Try 7 + 6 = 13 → Yes! That works. All three numbers (7, 6, 13) are in the list.

Check: 7 + 6 = 13 → correct.

Other possibilities?
7 + 4 = 11 → 11 not in list.
6 + 4 = 10 → 10 not in list.
12 + 4 = 16 → 16 not in list.
13 + 4 = 17 → 17 not in list.
So only 7 + 6 = 13 works with the given numbers.

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