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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 81 · 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. 1.3 × 9 =
  2. 2.19 × 98 =
  3. 3.7 × 19 =
  4. 4.3 × 49 =
  5. 5.8 × 9 =
  6. 6.13 × 29 =
  7. 7.21 × 99 =
  8. 8.12 × 99 =
  9. 9.6 × 49 =
  10. 10.4 × 19 =
  11. 11.12 × 49 =
  12. 12.15 × 49 =
  13. 13.6 × 19 =
  14. 14.32 × 98 =
  15. 15.15 × 29 =
  16. 16.3 × 49 =
  17. 17.23 × 99 =
  18. 18.15 × 9 =
  19. 19.5 × 9 =
  20. 20.12 × 29 =
  21. 21.25 × 98 =
  22. 22.10 × 98 =
  23. 23.10 × 9 =
  24. 24.5 × 29 =
  25. 25.5 × 9 =
  26. 26.6 × 29 =
  27. 27.17 × 99 =
  28. 28.8 × 29 =
  29. 29.4 × 99 =
  30. 30.9 × 9 =
  31. 31.4 × 99 =
  32. 32.15 × 9 =
  33. 33.22 × 98 =
  34. 34.4 × 19 =
  35. 35.14 × 49 =
  36. 36.13 × 9 =
  37. 37.6 × 9 =
  38. 38.15 × 19 =
  39. 39.24 × 99 =
  40. 40.12 × 99 =

Answer key

  1. 27
  2. 1862
  3. 133
  4. 147
  5. 72
  6. 377
  7. 2079
  8. 1188
  9. 294
  10. 76
  11. 588
  12. 735
  13. 114
  14. 3136
  15. 435
  16. 147
  17. 2277
  18. 135
  19. 45
  20. 348
  21. 2450
  22. 980
  23. 90
  24. 145
  25. 45
  26. 174
  27. 1683
  28. 232
  29. 396
  30. 81
  31. 396
  32. 135
  33. 2156
  34. 76
  35. 686
  36. 117
  37. 54
  38. 285
  39. 2376
  40. 1188

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