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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 208 · 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. 1.7 × 19 =
  2. 2.13 × 9 =
  3. 3.5 × 29 =
  4. 4.38 × 99 =
  5. 5.13 × 29 =
  6. 6.9 × 49 =
  7. 7.15 × 99 =
  8. 8.15 × 49 =
  9. 9.38 × 99 =
  10. 10.14 × 29 =
  11. 11.3 × 49 =
  12. 12.12 × 9 =
  13. 13.14 × 9 =
  14. 14.4 × 19 =
  15. 15.10 × 98 =
  16. 16.11 × 98 =
  17. 17.8 × 9 =
  18. 18.4 × 19 =
  19. 19.8 × 98 =
  20. 20.17 × 99 =
  21. 21.4 × 29 =
  22. 22.38 × 99 =
  23. 23.15 × 29 =
  24. 24.15 × 19 =
  25. 25.5 × 19 =
  26. 26.24 × 98 =
  27. 27.28 × 99 =
  28. 28.3 × 29 =
  29. 29.12 × 9 =
  30. 30.11 × 49 =
  31. 31.14 × 29 =
  32. 32.30 × 98 =
  33. 33.9 × 19 =
  34. 34.30 × 99 =
  35. 35.7 × 49 =
  36. 36.12 × 9 =
  37. 37.15 × 9 =
  38. 38.5 × 49 =
  39. 39.9 × 29 =
  40. 40.25 × 98 =

Answer key

  1. 133
  2. 117
  3. 145
  4. 3762
  5. 377
  6. 441
  7. 1485
  8. 735
  9. 3762
  10. 406
  11. 147
  12. 108
  13. 126
  14. 76
  15. 980
  16. 1078
  17. 72
  18. 76
  19. 784
  20. 1683
  21. 116
  22. 3762
  23. 435
  24. 285
  25. 95
  26. 2352
  27. 2772
  28. 87
  29. 108
  30. 539
  31. 406
  32. 2940
  33. 171
  34. 2970
  35. 343
  36. 108
  37. 135
  38. 245
  39. 261
  40. 2450

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