Let’s solve each addition problem step by step. We’ll add the two numbers in each box, starting from the right (ones place) and moving to the left (tens place). Since none of these problems require carrying over (the sum of the ones digits is always less than 10), we can just add straight across.
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First row:
-
40 + 35
Ones: 0 + 5 = 5
Tens: 4 + 3 = 7
→
75
-
22 + 12
Ones: 2 + 2 = 4
Tens: 2 + 1 = 3
→
34
-
36 + 12
Ones: 6 + 2 = 8
Tens: 3 + 1 = 4
→
48
---
Second row:
-
65 + 32
Ones: 5 + 2 = 7
Tens: 6 + 3 = 9
→
97
-
27 + 41
Ones: 7 + 1 = 8
Tens: 2 + 4 = 6
→
68
-
20 + 47
Ones: 0 + 7 = 7
Tens: 2 + 4 = 6
→
67
---
Third row:
-
36 + 32
Ones: 6 + 2 = 8
Tens: 3 + 3 = 6
→
68
-
38 + 61
Ones: 8 + 1 = 9
Tens: 3 + 6 = 9
→
99
-
28 + 20
Ones: 8 + 0 = 8
Tens: 2 + 2 = 4
→
48
---
Fourth row:
-
37 + 31
Ones: 7 + 1 = 8
Tens: 3 + 3 = 6
→
68
-
28 + 21
Ones: 8 + 1 = 9
Tens: 2 + 2 = 4
→
49
-
61 + 31
Ones: 1 + 1 = 2
Tens: 6 + 3 = 9
→
92
---
All answers have been double-checked for accuracy.
Final Answer:
75, 34, 48, 97, 68, 67, 68, 99, 48, 68, 49, 92
Parent Tip: Review the logic above to help your child master the concept of two digit addition worksheet first grade.
