Let’s solve each addition problem step by step. We’ll add the two-digit numbers carefully, column by column (ones first, then tens), and carry over if needed.
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A: 41 + 23
Ones: 1 + 3 = 4
Tens: 4 + 2 = 6
→
64
B: 56 + 14
Ones: 6 + 4 = 10 → write 0, carry 1
Tens: 5 + 1 = 6, plus carried 1 = 7
→
70
C: 81 + 90
Ones: 1 + 0 = 1
Tens: 8 + 9 = 17 → write 7, carry 1 to hundreds
→
171
D: 24 + 92
Ones: 4 + 2 = 6
Tens: 2 + 9 = 11 → write 1, carry 1 to hundreds
→
116
E: 83 + 21
Ones: 3 + 1 = 4
Tens: 8 + 2 = 10 → write 0, carry 1 to hundreds
→
104
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F: 55 + 78
Ones: 5 + 8 = 13 → write 3, carry 1
Tens: 5 + 7 = 12, plus carried 1 = 13 → write 3, carry 1 to hundreds
→
133
G: 16 + 11
Ones: 6 + 1 = 7
Tens: 1 + 1 = 2
→
27
H: 35 + 67
Ones: 5 + 7 = 12 → write 2, carry 1
Tens: 3 + 6 = 9, plus carried 1 = 10 → write 0, carry 1 to hundreds
→
102
I: 66 + 80
Ones: 6 + 0 = 6
Tens: 6 + 8 = 14 → write 4, carry 1 to hundreds
→
146
J: 41 + 34
Ones: 1 + 4 = 5
Tens: 4 + 3 = 7
→
75
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K: 15 + 36
Ones: 5 + 6 = 11 → write 1, carry 1
Tens: 1 + 3 = 4, plus carried 1 = 5
→
51
L: 97 + 20
Ones: 7 + 0 = 7
Tens: 9 + 2 = 11 → write 1, carry 1 to hundreds
→
117
M: 8 + 98
(Think of 8 as 08)
Ones: 8 + 8 = 16 → write 6, carry 1
Tens: 0 + 9 = 9, plus carried 1 = 10 → write 0, carry 1 to hundreds
→
106
N: 13 + 37
Ones: 3 + 7 = 10 → write 0, carry 1
Tens: 1 + 3 = 4, plus carried 1 = 5
→
50
O: 82 + 13
Ones: 2 + 3 = 5
Tens: 8 + 1 = 9
→
95
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P: 72 + 30
Ones: 2 + 0 = 2
Tens: 7 + 3 = 10 → write 0, carry 1 to hundreds
→
102
Q: 51 + 72
Ones: 1 + 2 = 3
Tens: 5 + 7 = 12 → write 2, carry 1 to hundreds
→
123
R: 88 + 19
Ones: 8 + 9 = 17 → write 7, carry 1
Tens: 8 + 1 = 9, plus carried 1 = 10 → write 0, carry 1 to hundreds
→
107
S: 27 + 54
Ones: 7 + 4 = 11 → write 1, carry 1
Tens: 2 + 5 = 7, plus carried 1 = 8
→
81
T: 42 + 33
Ones: 2 + 3 = 5
Tens: 4 + 3 = 7
→
75
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Final Answer:
A: 64, B: 70, C: 171, D: 116, E: 104, F: 133, G: 27, H: 102, I: 146, J: 75, K: 51, L: 117, M: 106, N: 50, O: 95, P: 102, Q: 123, R: 107, S: 81, T: 75
Parent Tip: Review the logic above to help your child master the concept of addition worksheet for juniors.
