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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 417 · 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. 1.5 × 49 =
  2. 2.7 × 49 =
  3. 3.14 × 29 =
  4. 4.40 × 99 =
  5. 5.28 × 98 =
  6. 6.6 × 19 =
  7. 7.4 × 19 =
  8. 8.9 × 9 =
  9. 9.27 × 99 =
  10. 10.13 × 19 =
  11. 11.11 × 29 =
  12. 12.10 × 9 =
  13. 13.8 × 99 =
  14. 14.14 × 9 =
  15. 15.13 × 9 =
  16. 16.6 × 99 =
  17. 17.4 × 49 =
  18. 18.3 × 99 =
  19. 19.14 × 49 =
  20. 20.20 × 99 =
  21. 21.8 × 98 =
  22. 22.12 × 49 =
  23. 23.14 × 9 =
  24. 24.13 × 49 =
  25. 25.5 × 9 =
  26. 26.10 × 29 =
  27. 27.3 × 29 =
  28. 28.6 × 9 =
  29. 29.3 × 19 =
  30. 30.6 × 9 =
  31. 31.3 × 98 =
  32. 32.7 × 19 =
  33. 33.40 × 99 =
  34. 34.35 × 98 =
  35. 35.9 × 9 =
  36. 36.31 × 99 =
  37. 37.9 × 49 =
  38. 38.5 × 49 =
  39. 39.23 × 99 =
  40. 40.11 × 9 =

Answer key

  1. 245
  2. 343
  3. 406
  4. 3960
  5. 2744
  6. 114
  7. 76
  8. 81
  9. 2673
  10. 247
  11. 319
  12. 90
  13. 792
  14. 126
  15. 117
  16. 594
  17. 196
  18. 297
  19. 686
  20. 1980
  21. 784
  22. 588
  23. 126
  24. 637
  25. 45
  26. 290
  27. 87
  28. 54
  29. 57
  30. 54
  31. 294
  32. 133
  33. 3960
  34. 3430
  35. 81
  36. 3069
  37. 441
  38. 245
  39. 2277
  40. 99

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