Column Addition (A) math worksheet for practicing vertical addition of two-digit numbers.

Let’s solve each column addition problem step by step. We’ll add the numbers in each vertical column from top to bottom.

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First row of problems:

1.
5
7
9
+ 9
= 5 + 7 = 12; 12 + 9 = 21; 21 + 9 = 30

2.
3
8
8
+ 6
= 3 + 8 = 11; 11 + 8 = 19; 19 + 6 = 25

3.
9
5
7
+ 7
= 9 + 5 = 14; 14 + 7 = 21; 21 + 7 = 28

4.
2
7
1
+ 2
= 2 + 7 = 9; 9 + 1 = 10; 10 + 2 = 12

5.
9
5
8
+ 2
= 9 + 5 = 14; 14 + 8 = 22; 22 + 2 = 24

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Second row:

6.
8
3
5
+ 6
= 8 + 3 = 11; 11 + 5 = 16; 16 + 6 = 22

7.
6
5
8
+ 4
= 6 + 5 = 11; 11 + 8 = 19; 19 + 4 = 23

8.
2
4
6
+ 9
= 2 + 4 = 6; 6 + 6 = 12; 12 + 9 = 21

9.
7
7
2
+ 6
= 7 + 7 = 14; 14 + 2 = 16; 16 + 6 = 22

10.
4
8
1
+ 1
= 4 + 8 = 12; 12 + 1 = 13; 13 + 1 = 14

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Third row:

11.
8
5
8
+ 3
= 8 + 5 = 13; 13 + 8 = 21; 21 + 3 = 24

12.
9
2
7
+ 9
= 9 + 2 = 11; 11 + 7 = 18; 18 + 9 = 27

13.
7
4
9
+ 2
= 7 + 4 = 11; 11 + 9 = 20; 20 + 2 = 22

14.
3
5
4
+ 9
= 3 + 5 = 8; 8 + 4 = 12; 12 + 9 = 21

15.
8
8
5
+ 3
= 8 + 8 = 16; 16 + 5 = 21; 21 + 3 = 24

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Fourth row:

16.
7
8
7
+ 7
= 7 + 8 = 15; 15 + 7 = 22; 22 + 7 = 29

17.
9
9
8
+ 8
= 9 + 9 = 18; 18 + 8 = 26; 26 + 8 = 34

18.
9
1
3
+ 8
= 9 + 1 = 10; 10 + 3 = 13; 13 + 8 = 21

19.
6
5
5
+ 3
= 6 + 5 = 11; 11 + 5 = 16; 16 + 3 = 19

20.
9
8
5
+ 2
= 9 + 8 = 17; 17 + 5 = 22; 22 + 2 = 24

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Fifth row:

21.
4
8
1
+ 9
= 4 + 8 = 12; 12 + 1 = 13; 13 + 9 = 22

22.
3
2
4
+ 7
= 3 + 2 = 5; 5 + 4 = 9; 9 + 7 = 16

23.
8
5
1
+ 8
= 8 + 5 = 13; 13 + 1 = 14; 14 + 8 = 22

24.
7
9
5
+ 2
= 7 + 9 = 16; 16 + 5 = 21; 21 + 2 = 23

25.
7
3
6
+ 2
= 7 + 3 = 10; 10 + 6 = 16; 16 + 2 = 18

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Final Answer:
30, 25, 28, 12, 24,
22, 23, 21, 22, 14,
24, 27, 22, 21, 24,
29, 34, 21, 19, 24,
22, 16, 22, 23, 18