2nd Grade Math Worksheets - 3-Digit Mixed Addition and Subtraction ... - Free Printable
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Step-by-step solution for: 2nd Grade Math Worksheets - 3-Digit Mixed Addition and Subtraction ...
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Show Answer Key & Explanations
Step-by-step solution for: 2nd Grade Math Worksheets - 3-Digit Mixed Addition and Subtraction ...
Let’s solve each math problem one by one. These are 3-digit addition and subtraction problems with regrouping (also called carrying or borrowing). We’ll go row by row, left to right.
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Row 1:
1. 523 + 786
- Ones: 3 + 6 = 9
- Tens: 2 + 8 = 10 → write 0, carry 1
- Hundreds: 5 + 7 = 12, plus 1 carried = 13
→ 1309
2. 732 - 382
- Ones: 2 - 2 = 0
- Tens: 3 - 8 → can’t do, borrow from hundreds → 13 - 8 = 5
- Hundreds: 6 (after borrowing) - 3 = 3
→ 350
3. 441 + 569
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 4 + 6 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 4 + 5 = 9, plus 1 = 10
→ 1010
4. 869 - 778
- Ones: 9 - 8 = 1
- Tens: 6 - 7 → can’t do, borrow → 16 - 7 = 9
- Hundreds: 7 (after borrowing) - 7 = 0
→ 91
5. 339 + 528
- Ones: 9 + 8 = 17 → write 7, carry 1
- Tens: 3 + 2 = 5, plus 1 = 6
- Hundreds: 3 + 5 = 8
→ 867
6. 889 - 699
- Ones: 9 - 9 = 0
- Tens: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Hundreds: 7 (after borrowing) - 6 = 1
→ 190
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Row 2:
7. 412 + 818
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 1 + 1 = 2, plus 1 = 3
- Hundreds: 4 + 8 = 12
→ 1230
8. 322 - 174
- Ones: 2 - 4 → can’t do, borrow → 12 - 4 = 8
- Tens: 1 (after borrowing) - 7 → can’t do, borrow → 11 - 7 = 4
- Hundreds: 2 (after borrowing) - 1 = 1
→ 148
9. 274 + 299
- Ones: 4 + 9 = 13 → write 3, carry 1
- Tens: 7 + 9 = 16, plus 1 = 17 → write 7, carry 1
- Hundreds: 2 + 2 = 4, plus 1 = 5
→ 573
10. 323 - 168
- Ones: 3 - 8 → can’t do, borrow → 13 - 8 = 5
- Tens: 1 (after borrowing) - 6 → can’t do, borrow → 11 - 6 = 5
- Hundreds: 2 (after borrowing) - 1 = 1
→ 155
11. 226 + 286
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 2 + 8 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 2 + 2 = 4, plus 1 = 5
→ 512
12. 588 - 293
- Ones: 8 - 3 = 5
- Tens: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Hundreds: 4 (after borrowing) - 2 = 2
→ 295
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Row 3:
13. 726 + 189
- Ones: 6 + 9 = 15 → write 5, carry 1
- Tens: 2 + 8 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 7 + 1 = 8, plus 1 = 9
→ 915
14. 659 - 368
- Ones: 9 - 8 = 1
- Tens: 5 - 6 → can’t do, borrow → 15 - 6 = 9
- Hundreds: 5 (after borrowing) - 3 = 2
→ 291
15. 323 + 592
- Ones: 3 + 2 = 5
- Tens: 2 + 9 = 11 → write 1, carry 1
- Hundreds: 3 + 5 = 8, plus 1 = 9
→ 915
16. 693 - 287
- Ones: 3 - 7 → can’t do, borrow → 13 - 7 = 6
- Tens: 8 (after borrowing) - 8 = 0
- Hundreds: 6 - 2 = 4
→ 406
17. 342 + 185
- Ones: 2 + 5 = 7
- Tens: 4 + 8 = 12 → write 2, carry 1
- Hundreds: 3 + 1 = 4, plus 1 = 5
→ 527
18. 404 - 272
- Ones: 4 - 2 = 2
- Tens: 0 - 7 → can’t do, borrow → 10 - 7 = 3 (hundreds becomes 3)
- Hundreds: 3 - 2 = 1
→ 132
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Row 4:
19. 748 - 359
- Ones: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Tens: 3 (after borrowing) - 5 → can’t do, borrow → 13 - 5 = 8
- Hundreds: 6 (after borrowing) - 3 = 3
→ 389
20. 532 + 448
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 3 + 4 = 7, plus 1 = 8
- Hundreds: 5 + 4 = 9
→ 980
21. 545 - 267
- Ones: 5 - 7 → can’t do, borrow → 15 - 7 = 8
- Tens: 3 (after borrowing) - 6 → can’t do, borrow → 13 - 6 = 7
- Hundreds: 4 (after borrowing) - 2 = 2
→ 278
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Row 5:
22. 225 - 166
- Ones: 5 - 6 → can’t do, borrow → 15 - 6 = 9
- Tens: 1 (after borrowing) - 6 → can’t do, borrow → 11 - 6 = 5
- Hundreds: 1 (after borrowing) - 1 = 0
→ 59
23. 878 + 124
- Ones: 8 + 4 = 12 → write 2, carry 1
- Tens: 7 + 2 = 9, plus 1 = 10 → write 0, carry 1
- Hundreds: 8 + 1 = 9, plus 1 = 10
→ 1002
24. 555 - 469
- Ones: 5 - 9 → can’t do, borrow → 15 - 9 = 6
- Tens: 4 (after borrowing) - 6 → can’t do, borrow → 14 - 6 = 8
- Hundreds: 4 (after borrowing) - 4 = 0
→ 86
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Final Answer:
1309, 350, 1010, 91, 867, 190, 1230, 148, 573, 155, 512, 295, 915, 291, 915, 406, 527, 132, 389, 980, 278, 59, 1002, 86
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Row 1:
1. 523 + 786
- Ones: 3 + 6 = 9
- Tens: 2 + 8 = 10 → write 0, carry 1
- Hundreds: 5 + 7 = 12, plus 1 carried = 13
→ 1309
2. 732 - 382
- Ones: 2 - 2 = 0
- Tens: 3 - 8 → can’t do, borrow from hundreds → 13 - 8 = 5
- Hundreds: 6 (after borrowing) - 3 = 3
→ 350
3. 441 + 569
- Ones: 1 + 9 = 10 → write 0, carry 1
- Tens: 4 + 6 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 4 + 5 = 9, plus 1 = 10
→ 1010
4. 869 - 778
- Ones: 9 - 8 = 1
- Tens: 6 - 7 → can’t do, borrow → 16 - 7 = 9
- Hundreds: 7 (after borrowing) - 7 = 0
→ 91
5. 339 + 528
- Ones: 9 + 8 = 17 → write 7, carry 1
- Tens: 3 + 2 = 5, plus 1 = 6
- Hundreds: 3 + 5 = 8
→ 867
6. 889 - 699
- Ones: 9 - 9 = 0
- Tens: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Hundreds: 7 (after borrowing) - 6 = 1
→ 190
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Row 2:
7. 412 + 818
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 1 + 1 = 2, plus 1 = 3
- Hundreds: 4 + 8 = 12
→ 1230
8. 322 - 174
- Ones: 2 - 4 → can’t do, borrow → 12 - 4 = 8
- Tens: 1 (after borrowing) - 7 → can’t do, borrow → 11 - 7 = 4
- Hundreds: 2 (after borrowing) - 1 = 1
→ 148
9. 274 + 299
- Ones: 4 + 9 = 13 → write 3, carry 1
- Tens: 7 + 9 = 16, plus 1 = 17 → write 7, carry 1
- Hundreds: 2 + 2 = 4, plus 1 = 5
→ 573
10. 323 - 168
- Ones: 3 - 8 → can’t do, borrow → 13 - 8 = 5
- Tens: 1 (after borrowing) - 6 → can’t do, borrow → 11 - 6 = 5
- Hundreds: 2 (after borrowing) - 1 = 1
→ 155
11. 226 + 286
- Ones: 6 + 6 = 12 → write 2, carry 1
- Tens: 2 + 8 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 2 + 2 = 4, plus 1 = 5
→ 512
12. 588 - 293
- Ones: 8 - 3 = 5
- Tens: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Hundreds: 4 (after borrowing) - 2 = 2
→ 295
---
Row 3:
13. 726 + 189
- Ones: 6 + 9 = 15 → write 5, carry 1
- Tens: 2 + 8 = 10, plus 1 = 11 → write 1, carry 1
- Hundreds: 7 + 1 = 8, plus 1 = 9
→ 915
14. 659 - 368
- Ones: 9 - 8 = 1
- Tens: 5 - 6 → can’t do, borrow → 15 - 6 = 9
- Hundreds: 5 (after borrowing) - 3 = 2
→ 291
15. 323 + 592
- Ones: 3 + 2 = 5
- Tens: 2 + 9 = 11 → write 1, carry 1
- Hundreds: 3 + 5 = 8, plus 1 = 9
→ 915
16. 693 - 287
- Ones: 3 - 7 → can’t do, borrow → 13 - 7 = 6
- Tens: 8 (after borrowing) - 8 = 0
- Hundreds: 6 - 2 = 4
→ 406
17. 342 + 185
- Ones: 2 + 5 = 7
- Tens: 4 + 8 = 12 → write 2, carry 1
- Hundreds: 3 + 1 = 4, plus 1 = 5
→ 527
18. 404 - 272
- Ones: 4 - 2 = 2
- Tens: 0 - 7 → can’t do, borrow → 10 - 7 = 3 (hundreds becomes 3)
- Hundreds: 3 - 2 = 1
→ 132
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Row 4:
19. 748 - 359
- Ones: 8 - 9 → can’t do, borrow → 18 - 9 = 9
- Tens: 3 (after borrowing) - 5 → can’t do, borrow → 13 - 5 = 8
- Hundreds: 6 (after borrowing) - 3 = 3
→ 389
20. 532 + 448
- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 3 + 4 = 7, plus 1 = 8
- Hundreds: 5 + 4 = 9
→ 980
21. 545 - 267
- Ones: 5 - 7 → can’t do, borrow → 15 - 7 = 8
- Tens: 3 (after borrowing) - 6 → can’t do, borrow → 13 - 6 = 7
- Hundreds: 4 (after borrowing) - 2 = 2
→ 278
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Row 5:
22. 225 - 166
- Ones: 5 - 6 → can’t do, borrow → 15 - 6 = 9
- Tens: 1 (after borrowing) - 6 → can’t do, borrow → 11 - 6 = 5
- Hundreds: 1 (after borrowing) - 1 = 0
→ 59
23. 878 + 124
- Ones: 8 + 4 = 12 → write 2, carry 1
- Tens: 7 + 2 = 9, plus 1 = 10 → write 0, carry 1
- Hundreds: 8 + 1 = 9, plus 1 = 10
→ 1002
24. 555 - 469
- Ones: 5 - 9 → can’t do, borrow → 15 - 9 = 6
- Tens: 4 (after borrowing) - 6 → can’t do, borrow → 14 - 6 = 8
- Hundreds: 4 (after borrowing) - 4 = 0
→ 86
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Final Answer:
1309, 350, 1010, 91, 867, 190, 1230, 148, 573, 155, 512, 295, 915, 291, 915, 406, 527, 132, 389, 980, 278, 59, 1002, 86
Parent Tip: Review the logic above to help your child master the concept of printable addition subtraction worksheet 2nd grade.
