Let’s go through each addition problem step by step, checking our work as we go.
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Column 1:
1.
67 + 44
→ 60 + 40 = 100
→ 7 + 4 = 11
→ 100 + 11 =
111
2.
95 + 17
→ 95 + 10 = 105
→ 105 + 7 =
112
3.
28 + 28
→ 20 + 20 = 40
→ 8 + 8 = 16
→ 40 + 16 =
56
4.
37 + 45
→ 37 + 40 = 77
→ 77 + 5 =
82
5.
82 + 89
→ 82 + 80 = 162
→ 162 + 9 =
171
6.
60 + 60
→ 6 + 6 = 12 → so 60 + 60 =
120
7.
30 + 50
→ 3 + 5 = 8 → so 30 + 50 =
80
8.
50 + 70
→ 5 + 7 = 12 → so 50 + 70 =
120
9.
90 + 90
→ 9 + 9 = 18 → so 90 + 90 =
180
10.
40 + 80
→ 4 + 8 = 12 → so 40 + 80 =
120
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Column 2:
1.
26 + 38
→ 26 + 30 = 56
→ 56 + 8 =
64
2.
45 + 46
→ 45 + 40 = 85
→ 85 + 6 =
91
3.
88 + 88
→ 80 + 80 = 160
→ 8 + 8 = 16
→ 160 + 16 =
176
4.
53 + 54
→ 53 + 50 = 103
→ 103 + 4 =
107
5.
72 + 37
→ 72 + 30 = 102
→ 102 + 7 =
109
6.
40 + 40
→ 4 + 4 = 8 → so 40 + 40 =
80
7.
60 + 70
→ 6 + 7 = 13 → so 60 + 70 =
130
8.
30 + 90
→ 3 + 9 = 12 → so 30 + 90 =
120
9.
20 + 60
→ 2 + 6 = 8 → so 20 + 60 =
80
10.
80 + 80
→ 8 + 8 = 16 → so 80 + 80 =
160
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All calculations have been double-checked for accuracy.
Final Answer:
1. 111
2. 112
3. 56
4. 82
5. 171
6. 120
7. 80
8. 120
9. 180
10. 120
1. 64
2. 91
3. 176
4. 107
5. 109
6. 80
7. 130
8. 120
9. 80
10. 160
Parent Tip: Review the logic above to help your child master the concept of math worksheet for grade 4.
