Let’s solve each addition problem step by step. Since these are 2-digit numbers without regrouping, we can add the tens and ones separately — no carrying needed!
We’ll go row by row:
Left Column:
1.
18 + 31
Tens: 10 + 30 = 40
Ones: 8 + 1 = 9
Total: 40 + 9 =
49
2.
14 + 83
Tens: 10 + 80 = 90
Ones: 4 + 3 = 7
Total: 90 + 7 =
97
3.
36 + 52
Tens: 30 + 50 = 80
Ones: 6 + 2 = 8
Total: 80 + 8 =
88
4.
42 + 12
Tens: 40 + 10 = 50
Ones: 2 + 2 = 4
Total: 50 + 4 =
54
5.
53 + 42
Tens: 50 + 40 = 90
Ones: 3 + 2 = 5
Total: 90 + 5 =
95
6.
67 + 21
Tens: 60 + 20 = 80
Ones: 7 + 1 = 8
Total: 80 + 8 =
88
7.
73 + 13
Tens: 70 + 10 = 80
Ones: 3 + 3 = 6
Total: 80 + 6 =
86
8.
22 + 56
Tens: 20 + 50 = 70
Ones: 2 + 6 = 8
Total: 70 + 8 =
78
9.
19 + 70
Tens: 10 + 70 = 80
Ones: 9 + 0 = 9
Total: 80 + 9 =
89
10.
23 + 53
Tens: 20 + 50 = 70
Ones: 3 + 3 = 6
Total: 70 + 6 =
76
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Right Column:
1.
16 + 21
Tens: 10 + 20 = 30
Ones: 6 + 1 = 7
Total: 30 + 7 =
37
2.
35 + 24
Tens: 30 + 20 = 50
Ones: 5 + 4 = 9
Total: 50 + 9 =
59
3.
86 + 13
Tens: 80 + 10 = 90
Ones: 6 + 3 = 9
Total: 90 + 9 =
99
4.
43 + 51
Tens: 40 + 50 = 90
Ones: 3 + 1 = 4
Total: 90 + 4 =
94
5.
33 + 46
Tens: 30 + 40 = 70
Ones: 3 + 6 = 9
Total: 70 + 9 =
79
6.
31 + 57
Tens: 30 + 50 = 80
Ones: 1 + 7 = 8
Total: 80 + 8 =
88
7.
72 + 14
Tens: 70 + 10 = 80
Ones: 2 + 4 = 6
Total: 80 + 6 =
86
8.
54 + 24
Tens: 50 + 20 = 70
Ones: 4 + 4 = 8
Total: 70 + 8 =
78
9.
11 + 51
Tens: 10 + 50 = 60
Ones: 1 + 1 = 2
Total: 60 + 2 =
62
10.
25 + 22
Tens: 20 + 20 = 40
Ones: 5 + 2 = 7
Total: 40 + 7 =
47
✔ All answers checked — no regrouping was needed in any of them!
Final Answer:
Left column (top to bottom):
49, 97, 88, 54, 95, 88, 86, 78, 89, 76
Right column (top to bottom):
37, 59, 99, 94, 79, 88, 86, 78, 62, 47
Parent Tip: Review the logic above to help your child master the concept of two digit addition worksheet.
