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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 742 · 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. 1.15 × 49 =
  2. 2.3 × 98 =
  3. 3.29 × 99 =
  4. 4.4 × 19 =
  5. 5.23 × 98 =
  6. 6.7 × 9 =
  7. 7.4 × 49 =
  8. 8.3 × 29 =
  9. 9.10 × 49 =
  10. 10.17 × 99 =
  11. 11.40 × 98 =
  12. 12.18 × 99 =
  13. 13.10 × 19 =
  14. 14.6 × 49 =
  15. 15.13 × 99 =
  16. 16.35 × 98 =
  17. 17.6 × 19 =
  18. 18.5 × 99 =
  19. 19.10 × 19 =
  20. 20.15 × 98 =
  21. 21.4 × 29 =
  22. 22.3 × 9 =
  23. 23.5 × 9 =
  24. 24.35 × 99 =
  25. 25.15 × 98 =
  26. 26.5 × 29 =
  27. 27.3 × 9 =
  28. 28.15 × 49 =
  29. 29.15 × 29 =
  30. 30.14 × 29 =
  31. 31.15 × 29 =
  32. 32.31 × 99 =
  33. 33.3 × 29 =
  34. 34.7 × 19 =
  35. 35.3 × 9 =
  36. 36.8 × 49 =
  37. 37.9 × 29 =
  38. 38.3 × 19 =
  39. 39.11 × 19 =
  40. 40.11 × 29 =

Answer key

  1. 735
  2. 294
  3. 2871
  4. 76
  5. 2254
  6. 63
  7. 196
  8. 87
  9. 490
  10. 1683
  11. 3920
  12. 1782
  13. 190
  14. 294
  15. 1287
  16. 3430
  17. 114
  18. 495
  19. 190
  20. 1470
  21. 116
  22. 27
  23. 45
  24. 3465
  25. 1470
  26. 145
  27. 27
  28. 735
  29. 435
  30. 406
  31. 435
  32. 3069
  33. 87
  34. 133
  35. 27
  36. 392
  37. 261
  38. 57
  39. 209
  40. 319

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