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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 491 · 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. 1.9 × 9 =
  2. 2.9 × 29 =
  3. 3.7 × 29 =
  4. 4.12 × 9 =
  5. 5.15 × 9 =
  6. 6.14 × 9 =
  7. 7.6 × 9 =
  8. 8.4 × 29 =
  9. 9.7 × 19 =
  10. 10.40 × 98 =
  11. 11.15 × 29 =
  12. 12.5 × 29 =
  13. 13.8 × 98 =
  14. 14.12 × 29 =
  15. 15.11 × 98 =
  16. 16.6 × 49 =
  17. 17.35 × 98 =
  18. 18.16 × 99 =
  19. 19.3 × 29 =
  20. 20.6 × 19 =
  21. 21.4 × 9 =
  22. 22.28 × 99 =
  23. 23.10 × 98 =
  24. 24.36 × 99 =
  25. 25.22 × 99 =
  26. 26.3 × 19 =
  27. 27.5 × 9 =
  28. 28.4 × 9 =
  29. 29.15 × 29 =
  30. 30.13 × 29 =
  31. 31.14 × 49 =
  32. 32.24 × 98 =
  33. 33.4 × 49 =
  34. 34.13 × 19 =
  35. 35.9 × 29 =
  36. 36.5 × 9 =
  37. 37.33 × 98 =
  38. 38.28 × 98 =
  39. 39.35 × 99 =
  40. 40.7 × 29 =

Answer key

  1. 81
  2. 261
  3. 203
  4. 108
  5. 135
  6. 126
  7. 54
  8. 116
  9. 133
  10. 3920
  11. 435
  12. 145
  13. 784
  14. 348
  15. 1078
  16. 294
  17. 3430
  18. 1584
  19. 87
  20. 114
  21. 36
  22. 2772
  23. 980
  24. 3564
  25. 2178
  26. 57
  27. 45
  28. 36
  29. 435
  30. 377
  31. 686
  32. 2352
  33. 196
  34. 247
  35. 261
  36. 45
  37. 3234
  38. 2744
  39. 3465
  40. 203

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