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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 758 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.10 × 29 =
  2. 2.4 × 29 =
  3. 3.14 × 29 =
  4. 4.9 × 99 =
  5. 5.11 × 49 =
  6. 6.10 × 49 =
  7. 7.22 × 99 =
  8. 8.12 × 19 =
  9. 9.14 × 9 =
  10. 10.12 × 19 =
  11. 11.7 × 9 =
  12. 12.12 × 29 =
  13. 13.8 × 49 =
  14. 14.7 × 98 =
  15. 15.8 × 9 =
  16. 16.14 × 29 =
  17. 17.6 × 99 =
  18. 18.10 × 19 =
  19. 19.9 × 99 =
  20. 20.12 × 9 =
  21. 21.7 × 49 =
  22. 22.3 × 9 =
  23. 23.7 × 9 =
  24. 24.14 × 98 =
  25. 25.10 × 98 =
  26. 26.15 × 49 =
  27. 27.14 × 49 =
  28. 28.20 × 99 =
  29. 29.10 × 49 =
  30. 30.21 × 99 =
  31. 31.3 × 49 =
  32. 32.4 × 19 =
  33. 33.14 × 99 =
  34. 34.5 × 19 =
  35. 35.8 × 9 =
  36. 36.38 × 99 =
  37. 37.39 × 99 =
  38. 38.9 × 29 =
  39. 39.14 × 99 =
  40. 40.12 × 49 =

Answer key

  1. 290
  2. 116
  3. 406
  4. 891
  5. 539
  6. 490
  7. 2178
  8. 228
  9. 126
  10. 228
  11. 63
  12. 348
  13. 392
  14. 686
  15. 72
  16. 406
  17. 594
  18. 190
  19. 891
  20. 108
  21. 343
  22. 27
  23. 63
  24. 1372
  25. 980
  26. 735
  27. 686
  28. 1980
  29. 490
  30. 2079
  31. 147
  32. 76
  33. 1386
  34. 95
  35. 72
  36. 3762
  37. 3861
  38. 261
  39. 1386
  40. 588

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