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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 125 · 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. 1.15 × 99 =
  2. 2.4 × 19 =
  3. 3.12 × 9 =
  4. 4.37 × 99 =
  5. 5.22 × 98 =
  6. 6.30 × 99 =
  7. 7.10 × 99 =
  8. 8.8 × 19 =
  9. 9.36 × 98 =
  10. 10.24 × 98 =
  11. 11.22 × 98 =
  12. 12.4 × 99 =
  13. 13.14 × 49 =
  14. 14.19 × 99 =
  15. 15.4 × 49 =
  16. 16.10 × 19 =
  17. 17.37 × 98 =
  18. 18.12 × 49 =
  19. 19.5 × 19 =
  20. 20.11 × 9 =
  21. 21.13 × 9 =
  22. 22.8 × 29 =
  23. 23.6 × 19 =
  24. 24.5 × 29 =
  25. 25.9 × 19 =
  26. 26.9 × 9 =
  27. 27.6 × 9 =
  28. 28.9 × 29 =
  29. 29.4 × 19 =
  30. 30.21 × 99 =
  31. 31.4 × 19 =
  32. 32.8 × 99 =
  33. 33.15 × 9 =
  34. 34.8 × 9 =
  35. 35.11 × 49 =
  36. 36.31 × 98 =
  37. 37.6 × 19 =
  38. 38.3 × 19 =
  39. 39.5 × 29 =
  40. 40.9 × 19 =

Answer key

  1. 1485
  2. 76
  3. 108
  4. 3663
  5. 2156
  6. 2970
  7. 990
  8. 152
  9. 3528
  10. 2352
  11. 2156
  12. 396
  13. 686
  14. 1881
  15. 196
  16. 190
  17. 3626
  18. 588
  19. 95
  20. 99
  21. 117
  22. 232
  23. 114
  24. 145
  25. 171
  26. 81
  27. 54
  28. 261
  29. 76
  30. 2079
  31. 76
  32. 792
  33. 135
  34. 72
  35. 539
  36. 3038
  37. 114
  38. 57
  39. 145
  40. 171

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