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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 525 · 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. 1.12 × 99 =
  2. 2.11 × 98 =
  3. 3.28 × 98 =
  4. 4.3 × 29 =
  5. 5.38 × 98 =
  6. 6.10 × 19 =
  7. 7.30 × 98 =
  8. 8.10 × 49 =
  9. 9.10 × 49 =
  10. 10.12 × 9 =
  11. 11.7 × 49 =
  12. 12.10 × 29 =
  13. 13.5 × 29 =
  14. 14.40 × 99 =
  15. 15.11 × 9 =
  16. 16.4 × 9 =
  17. 17.10 × 29 =
  18. 18.11 × 29 =
  19. 19.12 × 49 =
  20. 20.8 × 9 =
  21. 21.5 × 49 =
  22. 22.5 × 9 =
  23. 23.4 × 49 =
  24. 24.18 × 98 =
  25. 25.6 × 29 =
  26. 26.7 × 49 =
  27. 27.3 × 19 =
  28. 28.40 × 99 =
  29. 29.3 × 9 =
  30. 30.6 × 49 =
  31. 31.35 × 99 =
  32. 32.8 × 9 =
  33. 33.4 × 49 =
  34. 34.6 × 19 =
  35. 35.7 × 19 =
  36. 36.15 × 19 =
  37. 37.15 × 99 =
  38. 38.36 × 99 =
  39. 39.14 × 29 =
  40. 40.12 × 29 =

Answer key

  1. 1188
  2. 1078
  3. 2744
  4. 87
  5. 3724
  6. 190
  7. 2940
  8. 490
  9. 490
  10. 108
  11. 343
  12. 290
  13. 145
  14. 3960
  15. 99
  16. 36
  17. 290
  18. 319
  19. 588
  20. 72
  21. 245
  22. 45
  23. 196
  24. 1764
  25. 174
  26. 343
  27. 57
  28. 3960
  29. 27
  30. 294
  31. 3465
  32. 72
  33. 196
  34. 114
  35. 133
  36. 285
  37. 1485
  38. 3564
  39. 406
  40. 348

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