Let’s solve each addition problem step by step. We’ll add the numbers column by column (ones, then tens, then hundreds) and check if the sum is odd or even.
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Problem 1: 555 + 123
- Ones: 5 + 3 = 8
- Tens: 5 + 2 = 7
- Hundreds: 5 + 1 = 6
→ Sum =
678 → Even → Color cactus
dark green
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Problem 2: 432 + 103
- Ones: 2 + 3 = 5
- Tens: 3 + 0 = 3
- Hundreds: 4 + 1 = 5
→ Sum =
535 → Odd → Color cactus
light green
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Problem 3: 763 + 213
- Ones: 3 + 3 = 6
- Tens: 6 + 1 = 7
- Hundreds: 7 + 2 = 9
→ Sum =
976 → Even → Color cactus
dark green
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Problem 4: 435 + 323
- Ones: 5 + 3 = 8
- Tens: 3 + 2 = 5
- Hundreds: 4 + 3 = 7
→ Sum =
758 → Even → Color cactus
dark green
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Problem 5: 302 + 127
- Ones: 2 + 7 = 9
- Tens: 0 + 2 = 2
- Hundreds: 3 + 1 = 4
→ Sum =
429 → Odd → Color cactus
light green
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Problem 6: 135 + 204
- Ones: 5 + 4 = 9
- Tens: 3 + 0 = 3
- Hundreds: 1 + 2 = 3
→ Sum =
339 → Odd → Color cactus
light green
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Problem 7: 647 + 121
- Ones: 7 + 1 = 8
- Tens: 4 + 2 = 6
- Hundreds: 6 + 1 = 7
→ Sum =
768 → Even → Color cactus
dark green
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Problem 8: 594 + 303
- Ones: 4 + 3 = 7
- Tens: 9 + 0 = 9
- Hundreds: 5 + 3 = 8
→ Sum =
897 → Odd → Color cactus
light green
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Final Answer:
Here are the sums and colors for each cactus:
1. 555 + 123 =
678 → dark green
2. 432 + 103 =
535 → light green
3. 763 + 213 =
976 → dark green
4. 435 + 323 =
758 → dark green
5. 302 + 127 =
429 → light green
6. 135 + 204 =
339 → light green
7. 647 + 121 =
768 → dark green
8. 594 + 303 =
897 → light green
Parent Tip: Review the logic above to help your child master the concept of addition without regrouping worksheet for grade 3.
