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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 747 · 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. 1.20 × 98 =
  2. 2.12 × 49 =
  3. 3.5 × 49 =
  4. 4.39 × 98 =
  5. 5.15 × 49 =
  6. 6.19 × 99 =
  7. 7.11 × 19 =
  8. 8.33 × 99 =
  9. 9.8 × 29 =
  10. 10.4 × 29 =
  11. 11.6 × 9 =
  12. 12.4 × 19 =
  13. 13.14 × 99 =
  14. 14.8 × 9 =
  15. 15.13 × 9 =
  16. 16.14 × 9 =
  17. 17.22 × 99 =
  18. 18.4 × 19 =
  19. 19.8 × 29 =
  20. 20.15 × 99 =
  21. 21.7 × 19 =
  22. 22.3 × 9 =
  23. 23.11 × 19 =
  24. 24.15 × 29 =
  25. 25.12 × 49 =
  26. 26.3 × 9 =
  27. 27.10 × 29 =
  28. 28.4 × 99 =
  29. 29.15 × 19 =
  30. 30.9 × 99 =
  31. 31.13 × 29 =
  32. 32.7 × 19 =
  33. 33.8 × 19 =
  34. 34.4 × 98 =
  35. 35.4 × 49 =
  36. 36.29 × 99 =
  37. 37.8 × 49 =
  38. 38.33 × 98 =
  39. 39.6 × 49 =
  40. 40.25 × 99 =

Answer key

  1. 1960
  2. 588
  3. 245
  4. 3822
  5. 735
  6. 1881
  7. 209
  8. 3267
  9. 232
  10. 116
  11. 54
  12. 76
  13. 1386
  14. 72
  15. 117
  16. 126
  17. 2178
  18. 76
  19. 232
  20. 1485
  21. 133
  22. 27
  23. 209
  24. 435
  25. 588
  26. 27
  27. 290
  28. 396
  29. 285
  30. 891
  31. 377
  32. 133
  33. 152
  34. 392
  35. 196
  36. 2871
  37. 392
  38. 3234
  39. 294
  40. 2475

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