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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 91 · 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. 1.31 × 99 =
  2. 2.40 × 98 =
  3. 3.10 × 19 =
  4. 4.7 × 9 =
  5. 5.9 × 49 =
  6. 6.10 × 49 =
  7. 7.8 × 29 =
  8. 8.9 × 9 =
  9. 9.6 × 9 =
  10. 10.12 × 49 =
  11. 11.12 × 99 =
  12. 12.11 × 9 =
  13. 13.13 × 49 =
  14. 14.4 × 49 =
  15. 15.4 × 99 =
  16. 16.15 × 9 =
  17. 17.12 × 98 =
  18. 18.3 × 9 =
  19. 19.39 × 99 =
  20. 20.15 × 19 =
  21. 21.14 × 19 =
  22. 22.8 × 19 =
  23. 23.11 × 9 =
  24. 24.13 × 99 =
  25. 25.3 × 9 =
  26. 26.10 × 19 =
  27. 27.14 × 9 =
  28. 28.3 × 19 =
  29. 29.15 × 49 =
  30. 30.11 × 19 =
  31. 31.8 × 49 =
  32. 32.14 × 49 =
  33. 33.15 × 9 =
  34. 34.11 × 9 =
  35. 35.5 × 9 =
  36. 36.39 × 98 =
  37. 37.5 × 49 =
  38. 38.13 × 9 =
  39. 39.38 × 99 =
  40. 40.6 × 49 =

Answer key

  1. 3069
  2. 3920
  3. 190
  4. 63
  5. 441
  6. 490
  7. 232
  8. 81
  9. 54
  10. 588
  11. 1188
  12. 99
  13. 637
  14. 196
  15. 396
  16. 135
  17. 1176
  18. 27
  19. 3861
  20. 285
  21. 266
  22. 152
  23. 99
  24. 1287
  25. 27
  26. 190
  27. 126
  28. 57
  29. 735
  30. 209
  31. 392
  32. 686
  33. 135
  34. 99
  35. 45
  36. 3822
  37. 245
  38. 117
  39. 3762
  40. 294

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