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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 159 · 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. 1.4 × 9 =
  2. 2.5 × 49 =
  3. 3.5 × 19 =
  4. 4.7 × 19 =
  5. 5.11 × 99 =
  6. 6.7 × 29 =
  7. 7.7 × 9 =
  8. 8.11 × 29 =
  9. 9.8 × 29 =
  10. 10.8 × 29 =
  11. 11.33 × 99 =
  12. 12.39 × 99 =
  13. 13.12 × 9 =
  14. 14.7 × 9 =
  15. 15.11 × 49 =
  16. 16.19 × 98 =
  17. 17.29 × 99 =
  18. 18.9 × 49 =
  19. 19.22 × 99 =
  20. 20.11 × 98 =
  21. 21.14 × 29 =
  22. 22.8 × 19 =
  23. 23.4 × 99 =
  24. 24.9 × 19 =
  25. 25.4 × 9 =
  26. 26.8 × 49 =
  27. 27.14 × 99 =
  28. 28.9 × 19 =
  29. 29.13 × 9 =
  30. 30.39 × 99 =
  31. 31.4 × 19 =
  32. 32.22 × 98 =
  33. 33.3 × 29 =
  34. 34.14 × 29 =
  35. 35.13 × 9 =
  36. 36.4 × 19 =
  37. 37.13 × 9 =
  38. 38.5 × 29 =
  39. 39.7 × 29 =
  40. 40.14 × 49 =

Answer key

  1. 36
  2. 245
  3. 95
  4. 133
  5. 1089
  6. 203
  7. 63
  8. 319
  9. 232
  10. 232
  11. 3267
  12. 3861
  13. 108
  14. 63
  15. 539
  16. 1862
  17. 2871
  18. 441
  19. 2178
  20. 1078
  21. 406
  22. 152
  23. 396
  24. 171
  25. 36
  26. 392
  27. 1386
  28. 171
  29. 117
  30. 3861
  31. 76
  32. 2156
  33. 87
  34. 406
  35. 117
  36. 76
  37. 117
  38. 145
  39. 203
  40. 686

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