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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 234 · 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. 1.39 × 99 =
  2. 2.4 × 19 =
  3. 3.8 × 29 =
  4. 4.33 × 99 =
  5. 5.13 × 29 =
  6. 6.11 × 19 =
  7. 7.9 × 49 =
  8. 8.7 × 29 =
  9. 9.11 × 98 =
  10. 10.9 × 9 =
  11. 11.14 × 9 =
  12. 12.10 × 19 =
  13. 13.7 × 49 =
  14. 14.3 × 19 =
  15. 15.19 × 98 =
  16. 16.9 × 49 =
  17. 17.6 × 98 =
  18. 18.11 × 29 =
  19. 19.33 × 98 =
  20. 20.10 × 9 =
  21. 21.13 × 29 =
  22. 22.3 × 29 =
  23. 23.6 × 29 =
  24. 24.5 × 49 =
  25. 25.36 × 98 =
  26. 26.20 × 98 =
  27. 27.13 × 19 =
  28. 28.13 × 9 =
  29. 29.33 × 98 =
  30. 30.7 × 19 =
  31. 31.8 × 9 =
  32. 32.12 × 9 =
  33. 33.30 × 98 =
  34. 34.13 × 9 =
  35. 35.15 × 9 =
  36. 36.11 × 19 =
  37. 37.17 × 99 =
  38. 38.8 × 49 =
  39. 39.4 × 29 =
  40. 40.4 × 9 =

Answer key

  1. 3861
  2. 76
  3. 232
  4. 3267
  5. 377
  6. 209
  7. 441
  8. 203
  9. 1078
  10. 81
  11. 126
  12. 190
  13. 343
  14. 57
  15. 1862
  16. 441
  17. 588
  18. 319
  19. 3234
  20. 90
  21. 377
  22. 87
  23. 174
  24. 245
  25. 3528
  26. 1960
  27. 247
  28. 117
  29. 3234
  30. 133
  31. 72
  32. 108
  33. 2940
  34. 117
  35. 135
  36. 209
  37. 1683
  38. 392
  39. 116
  40. 36

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