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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 597 · 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. 1.35 × 99 =
  2. 2.8 × 19 =
  3. 3.3 × 19 =
  4. 4.7 × 29 =
  5. 5.15 × 49 =
  6. 6.7 × 29 =
  7. 7.10 × 29 =
  8. 8.12 × 29 =
  9. 9.4 × 29 =
  10. 10.5 × 19 =
  11. 11.3 × 29 =
  12. 12.13 × 29 =
  13. 13.3 × 98 =
  14. 14.8 × 19 =
  15. 15.12 × 49 =
  16. 16.3 × 9 =
  17. 17.3 × 29 =
  18. 18.6 × 29 =
  19. 19.9 × 19 =
  20. 20.10 × 9 =
  21. 21.27 × 99 =
  22. 22.12 × 29 =
  23. 23.8 × 19 =
  24. 24.4 × 49 =
  25. 25.14 × 19 =
  26. 26.14 × 19 =
  27. 27.39 × 98 =
  28. 28.5 × 98 =
  29. 29.15 × 49 =
  30. 30.5 × 29 =
  31. 31.7 × 49 =
  32. 32.6 × 19 =
  33. 33.7 × 9 =
  34. 34.3 × 19 =
  35. 35.10 × 9 =
  36. 36.5 × 9 =
  37. 37.4 × 19 =
  38. 38.7 × 29 =
  39. 39.26 × 98 =
  40. 40.4 × 98 =

Answer key

  1. 3465
  2. 152
  3. 57
  4. 203
  5. 735
  6. 203
  7. 290
  8. 348
  9. 116
  10. 95
  11. 87
  12. 377
  13. 294
  14. 152
  15. 588
  16. 27
  17. 87
  18. 174
  19. 171
  20. 90
  21. 2673
  22. 348
  23. 152
  24. 196
  25. 266
  26. 266
  27. 3822
  28. 490
  29. 735
  30. 145
  31. 343
  32. 114
  33. 63
  34. 57
  35. 90
  36. 45
  37. 76
  38. 203
  39. 2548
  40. 392

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