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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 74 · 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. 1.8 × 19 =
  2. 2.5 × 98 =
  3. 3.8 × 9 =
  4. 4.14 × 99 =
  5. 5.4 × 9 =
  6. 6.14 × 19 =
  7. 7.15 × 19 =
  8. 8.4 × 9 =
  9. 9.3 × 49 =
  10. 10.5 × 19 =
  11. 11.6 × 49 =
  12. 12.38 × 98 =
  13. 13.14 × 9 =
  14. 14.7 × 29 =
  15. 15.7 × 29 =
  16. 16.13 × 9 =
  17. 17.33 × 98 =
  18. 18.14 × 19 =
  19. 19.7 × 29 =
  20. 20.4 × 29 =
  21. 21.18 × 98 =
  22. 22.11 × 49 =
  23. 23.22 × 99 =
  24. 24.3 × 49 =
  25. 25.12 × 29 =
  26. 26.5 × 9 =
  27. 27.13 × 19 =
  28. 28.12 × 49 =
  29. 29.11 × 49 =
  30. 30.4 × 9 =
  31. 31.39 × 98 =
  32. 32.15 × 49 =
  33. 33.3 × 49 =
  34. 34.7 × 9 =
  35. 35.29 × 99 =
  36. 36.29 × 99 =
  37. 37.8 × 49 =
  38. 38.11 × 99 =
  39. 39.10 × 49 =
  40. 40.16 × 99 =

Answer key

  1. 152
  2. 490
  3. 72
  4. 1386
  5. 36
  6. 266
  7. 285
  8. 36
  9. 147
  10. 95
  11. 294
  12. 3724
  13. 126
  14. 203
  15. 203
  16. 117
  17. 3234
  18. 266
  19. 203
  20. 116
  21. 1764
  22. 539
  23. 2178
  24. 147
  25. 348
  26. 45
  27. 247
  28. 588
  29. 539
  30. 36
  31. 3822
  32. 735
  33. 147
  34. 63
  35. 2871
  36. 2871
  37. 392
  38. 1089
  39. 490
  40. 1584

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