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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 767 · 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. 1.11 × 9 =
  2. 2.12 × 49 =
  3. 3.12 × 9 =
  4. 4.14 × 9 =
  5. 5.31 × 98 =
  6. 6.4 × 49 =
  7. 7.11 × 9 =
  8. 8.4 × 19 =
  9. 9.4 × 49 =
  10. 10.4 × 49 =
  11. 11.5 × 9 =
  12. 12.10 × 9 =
  13. 13.6 × 49 =
  14. 14.9 × 49 =
  15. 15.5 × 49 =
  16. 16.12 × 29 =
  17. 17.8 × 29 =
  18. 18.13 × 9 =
  19. 19.39 × 99 =
  20. 20.10 × 9 =
  21. 21.33 × 99 =
  22. 22.14 × 19 =
  23. 23.7 × 49 =
  24. 24.13 × 99 =
  25. 25.9 × 9 =
  26. 26.39 × 99 =
  27. 27.4 × 49 =
  28. 28.9 × 9 =
  29. 29.24 × 99 =
  30. 30.3 × 9 =
  31. 31.7 × 9 =
  32. 32.9 × 19 =
  33. 33.14 × 19 =
  34. 34.14 × 9 =
  35. 35.12 × 98 =
  36. 36.6 × 99 =
  37. 37.31 × 99 =
  38. 38.11 × 98 =
  39. 39.9 × 49 =
  40. 40.15 × 29 =

Answer key

  1. 99
  2. 588
  3. 108
  4. 126
  5. 3038
  6. 196
  7. 99
  8. 76
  9. 196
  10. 196
  11. 45
  12. 90
  13. 294
  14. 441
  15. 245
  16. 348
  17. 232
  18. 117
  19. 3861
  20. 90
  21. 3267
  22. 266
  23. 343
  24. 1287
  25. 81
  26. 3861
  27. 196
  28. 81
  29. 2376
  30. 27
  31. 63
  32. 171
  33. 266
  34. 126
  35. 1176
  36. 594
  37. 3069
  38. 1078
  39. 441
  40. 435

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