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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 135 · 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. 1.15 × 19 =
  2. 2.3 × 9 =
  3. 3.32 × 98 =
  4. 4.32 × 98 =
  5. 5.10 × 9 =
  6. 6.20 × 99 =
  7. 7.19 × 99 =
  8. 8.14 × 99 =
  9. 9.13 × 29 =
  10. 10.5 × 29 =
  11. 11.7 × 29 =
  12. 12.5 × 49 =
  13. 13.29 × 99 =
  14. 14.11 × 49 =
  15. 15.7 × 19 =
  16. 16.13 × 29 =
  17. 17.3 × 99 =
  18. 18.12 × 29 =
  19. 19.4 × 9 =
  20. 20.13 × 29 =
  21. 21.4 × 19 =
  22. 22.9 × 29 =
  23. 23.3 × 9 =
  24. 24.4 × 49 =
  25. 25.3 × 19 =
  26. 26.14 × 29 =
  27. 27.8 × 29 =
  28. 28.12 × 49 =
  29. 29.8 × 9 =
  30. 30.6 × 99 =
  31. 31.3 × 9 =
  32. 32.3 × 99 =
  33. 33.6 × 29 =
  34. 34.6 × 29 =
  35. 35.13 × 19 =
  36. 36.15 × 9 =
  37. 37.12 × 49 =
  38. 38.3 × 49 =
  39. 39.3 × 29 =
  40. 40.4 × 9 =

Answer key

  1. 285
  2. 27
  3. 3136
  4. 3136
  5. 90
  6. 1980
  7. 1881
  8. 1386
  9. 377
  10. 145
  11. 203
  12. 245
  13. 2871
  14. 539
  15. 133
  16. 377
  17. 297
  18. 348
  19. 36
  20. 377
  21. 76
  22. 261
  23. 27
  24. 196
  25. 57
  26. 406
  27. 232
  28. 588
  29. 72
  30. 594
  31. 27
  32. 297
  33. 174
  34. 174
  35. 247
  36. 135
  37. 588
  38. 147
  39. 87
  40. 36

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