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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 189 · 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. 1.7 × 9 =
  2. 2.25 × 99 =
  3. 3.15 × 29 =
  4. 4.5 × 9 =
  5. 5.12 × 29 =
  6. 6.18 × 98 =
  7. 7.13 × 29 =
  8. 8.32 × 98 =
  9. 9.40 × 98 =
  10. 10.8 × 9 =
  11. 11.4 × 49 =
  12. 12.10 × 19 =
  13. 13.33 × 99 =
  14. 14.13 × 9 =
  15. 15.8 × 29 =
  16. 16.15 × 99 =
  17. 17.13 × 98 =
  18. 18.6 × 49 =
  19. 19.9 × 49 =
  20. 20.4 × 29 =
  21. 21.4 × 19 =
  22. 22.3 × 49 =
  23. 23.19 × 99 =
  24. 24.6 × 98 =
  25. 25.7 × 9 =
  26. 26.13 × 49 =
  27. 27.15 × 29 =
  28. 28.15 × 19 =
  29. 29.9 × 98 =
  30. 30.14 × 19 =
  31. 31.9 × 9 =
  32. 32.15 × 19 =
  33. 33.29 × 99 =
  34. 34.7 × 98 =
  35. 35.29 × 99 =
  36. 36.15 × 9 =
  37. 37.4 × 29 =
  38. 38.4 × 9 =
  39. 39.15 × 19 =
  40. 40.8 × 9 =

Answer key

  1. 63
  2. 2475
  3. 435
  4. 45
  5. 348
  6. 1764
  7. 377
  8. 3136
  9. 3920
  10. 72
  11. 196
  12. 190
  13. 3267
  14. 117
  15. 232
  16. 1485
  17. 1274
  18. 294
  19. 441
  20. 116
  21. 76
  22. 147
  23. 1881
  24. 588
  25. 63
  26. 637
  27. 435
  28. 285
  29. 882
  30. 266
  31. 81
  32. 285
  33. 2871
  34. 686
  35. 2871
  36. 135
  37. 116
  38. 36
  39. 285
  40. 72

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