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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 126 · 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. 2.11 × 98 =
  3. 3.13 × 99 =
  4. 4.15 × 19 =
  5. 5.15 × 99 =
  6. 6.22 × 98 =
  7. 7.4 × 9 =
  8. 8.13 × 29 =
  9. 9.8 × 99 =
  10. 10.20 × 98 =
  11. 11.38 × 99 =
  12. 12.7 × 9 =
  13. 13.7 × 29 =
  14. 14.5 × 99 =
  15. 15.9 × 9 =
  16. 16.18 × 98 =
  17. 17.9 × 49 =
  18. 18.6 × 9 =
  19. 19.13 × 29 =
  20. 20.4 × 19 =
  21. 21.9 × 19 =
  22. 22.9 × 98 =
  23. 23.7 × 29 =
  24. 24.20 × 98 =
  25. 25.23 × 99 =
  26. 26.3 × 9 =
  27. 27.9 × 29 =
  28. 28.39 × 98 =
  29. 29.5 × 9 =
  30. 30.7 × 9 =
  31. 31.6 × 9 =
  32. 32.5 × 29 =
  33. 33.15 × 9 =
  34. 34.7 × 29 =
  35. 35.17 × 99 =
  36. 36.3 × 49 =
  37. 37.10 × 19 =
  38. 38.4 × 9 =
  39. 39.9 × 98 =
  40. 40.15 × 19 =

Answer key

  1. 1485
  2. 1078
  3. 1287
  4. 285
  5. 1485
  6. 2156
  7. 36
  8. 377
  9. 792
  10. 1960
  11. 3762
  12. 63
  13. 203
  14. 495
  15. 81
  16. 1764
  17. 441
  18. 54
  19. 377
  20. 76
  21. 171
  22. 882
  23. 203
  24. 1960
  25. 2277
  26. 27
  27. 261
  28. 3822
  29. 45
  30. 63
  31. 54
  32. 145
  33. 135
  34. 203
  35. 1683
  36. 147
  37. 190
  38. 36
  39. 882
  40. 285

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