Let’s solve each number bond by adding the two bottom numbers to get the top number. We’ll go row by row, left to right.
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Row 1:
- 39 + 26 =
30 + 20 = 50
9 + 6 = 15
50 + 15 =
65
- 10 + 67 =
77
- 55 + 25 =
50 + 20 = 70
5 + 5 = 10
70 + 10 =
80
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Row 2:
- 37 + 12 =
30 + 10 = 40
7 + 2 = 9
40 + 9 =
49
- 18 + 45 =
10 + 40 = 50
8 + 5 = 13
50 + 13 =
63
- 29 + 43 =
20 + 40 = 60
9 + 3 = 12
60 + 12 =
72
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Row 3:
- 49 + 49 =
40 + 40 = 80
9 + 9 = 18
80 + 18 =
98
- 34 + 41 =
30 + 40 = 70
4 + 1 = 5
70 + 5 =
75
- 19 + 41 =
10 + 40 = 50
9 + 1 = 10
50 + 10 =
60
---
Row 4:
- 26 + 63 =
20 + 60 = 80
6 + 3 = 9
80 + 9 =
89
- 18 + 35 =
10 + 30 = 40
8 + 5 = 13
40 + 13 =
53
- 20 + 55 =
75
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Row 5:
- 16 + 46 =
10 + 40 = 50
6 + 6 = 12
50 + 12 =
62
- 30 + 29 =
30 + 20 = 50
0 + 9 = 9
50 + 9 =
59
- 13 + 84 =
10 + 80 = 90
3 + 4 = 7
90 + 7 =
97
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Now let’s list all answers in order (left to right, top to bottom):
65, 77, 80,
49, 63, 72,
98, 75, 60,
89, 53, 75,
62, 59, 97
Double-checking a few tricky ones:
- 49 + 49 → 50+50=100 minus 2 = 98
✔
- 19 + 41 → 20 + 40 = 60
✔
- 13 + 84 → 10+80=90, 3+4=7 → 97
✔
- 30 + 29 → 59
✔
- 26 + 63 → 89
✔
All look correct.
Final Answer:
65, 77, 80, 49, 63, 72, 98, 75, 60, 89, 53, 75, 62, 59, 97
Parent Tip: Review the logic above to help your child master the concept of addition worksheet sums to 100.
