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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 242 · 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. 1.5 × 29 =
  2. 2.6 × 9 =
  3. 3.38 × 99 =
  4. 4.18 × 99 =
  5. 5.28 × 98 =
  6. 6.14 × 49 =
  7. 7.3 × 29 =
  8. 8.17 × 98 =
  9. 9.39 × 99 =
  10. 10.10 × 49 =
  11. 11.39 × 98 =
  12. 12.34 × 99 =
  13. 13.8 × 49 =
  14. 14.4 × 19 =
  15. 15.8 × 49 =
  16. 16.13 × 29 =
  17. 17.15 × 9 =
  18. 18.34 × 99 =
  19. 19.13 × 19 =
  20. 20.13 × 49 =
  21. 21.10 × 19 =
  22. 22.5 × 49 =
  23. 23.11 × 19 =
  24. 24.19 × 98 =
  25. 25.3 × 98 =
  26. 26.11 × 49 =
  27. 27.6 × 19 =
  28. 28.7 × 9 =
  29. 29.39 × 98 =
  30. 30.4 × 9 =
  31. 31.12 × 19 =
  32. 32.9 × 49 =
  33. 33.27 × 99 =
  34. 34.4 × 29 =
  35. 35.20 × 99 =
  36. 36.12 × 29 =
  37. 37.6 × 19 =
  38. 38.4 × 19 =
  39. 39.12 × 9 =
  40. 40.34 × 98 =

Answer key

  1. 145
  2. 54
  3. 3762
  4. 1782
  5. 2744
  6. 686
  7. 87
  8. 1666
  9. 3861
  10. 490
  11. 3822
  12. 3366
  13. 392
  14. 76
  15. 392
  16. 377
  17. 135
  18. 3366
  19. 247
  20. 637
  21. 190
  22. 245
  23. 209
  24. 1862
  25. 294
  26. 539
  27. 114
  28. 63
  29. 3822
  30. 36
  31. 228
  32. 441
  33. 2673
  34. 116
  35. 1980
  36. 348
  37. 114
  38. 76
  39. 108
  40. 3332

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