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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 388 · 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. 1.13 × 9 =
  2. 2.19 × 99 =
  3. 3.31 × 99 =
  4. 4.28 × 98 =
  5. 5.34 × 99 =
  6. 6.11 × 49 =
  7. 7.29 × 98 =
  8. 8.8 × 19 =
  9. 9.14 × 29 =
  10. 10.15 × 49 =
  11. 11.4 × 29 =
  12. 12.9 × 19 =
  13. 13.36 × 99 =
  14. 14.8 × 29 =
  15. 15.17 × 98 =
  16. 16.3 × 98 =
  17. 17.4 × 29 =
  18. 18.11 × 98 =
  19. 19.8 × 9 =
  20. 20.5 × 19 =
  21. 21.3 × 19 =
  22. 22.10 × 29 =
  23. 23.23 × 99 =
  24. 24.7 × 29 =
  25. 25.12 × 9 =
  26. 26.12 × 29 =
  27. 27.8 × 99 =
  28. 28.28 × 99 =
  29. 29.34 × 99 =
  30. 30.9 × 19 =
  31. 31.5 × 19 =
  32. 32.10 × 29 =
  33. 33.10 × 29 =
  34. 34.8 × 19 =
  35. 35.10 × 19 =
  36. 36.8 × 19 =
  37. 37.13 × 19 =
  38. 38.12 × 99 =
  39. 39.31 × 98 =
  40. 40.6 × 9 =

Answer key

  1. 117
  2. 1881
  3. 3069
  4. 2744
  5. 3366
  6. 539
  7. 2842
  8. 152
  9. 406
  10. 735
  11. 116
  12. 171
  13. 3564
  14. 232
  15. 1666
  16. 294
  17. 116
  18. 1078
  19. 72
  20. 95
  21. 57
  22. 290
  23. 2277
  24. 203
  25. 108
  26. 348
  27. 792
  28. 2772
  29. 3366
  30. 171
  31. 95
  32. 290
  33. 290
  34. 152
  35. 190
  36. 152
  37. 247
  38. 1188
  39. 3038
  40. 54

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