Let’s go through each problem one by one and solve them carefully.
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First row:
1.
99 + 22
→ 99 + 20 = 119, then +2 =
121
2.
70 + 3
→ Just add:
73
3.
48 + 10
→ Add 10 to 48:
58
4.
52 + 9
→ 52 + 10 = 62, minus 1 =
61
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Second row:
5.
89 + 5
→ 89 + 1 = 90, then +4 =
94
6.
63 + 10
→ Add 10:
73
7.
64 + 40
→ 64 + 40 =
104
8.
32 + 12
→ 32 + 10 = 42, +2 =
44
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Third row:
9.
82 + 12
→ 82 + 10 = 92, +2 =
94
10.
19 + 29
→ 19 + 30 = 49, minus 1 =
48
11.
52 + 52
→ Double 52:
104
12.
46 + 3
→ Simple addition:
49
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Bottom section (three-number additions):
13.
8 + 3 + 2
→ 8 + 3 = 11, +2 =
13
14.
7 + 2 + 5
→ 7 + 2 = 9, +5 =
14
15.
5 + 2 + 1
→ 5 + 2 = 7, +1 =
8
16.
2 + 3 + 1
→ 2 + 3 = 5, +1 =
6
17.
1 + 8 + 5
→ 1 + 8 = 9, +5 =
14
18.
12 + 3 + 2
→ 12 + 3 = 15, +2 =
17
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All calculations checked and verified.
Final Answer:
121, 73, 58, 61, 94, 73, 104, 44, 94, 48, 104, 49, 13, 14, 8, 6, 14, 17
Parent Tip: Review the logic above to help your child master the concept of 2nd grade math addition worksheet.
