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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 489 · 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. 1.32 × 98 =
  2. 2.3 × 9 =
  3. 3.3 × 49 =
  4. 4.11 × 19 =
  5. 5.9 × 49 =
  6. 6.11 × 49 =
  7. 7.5 × 9 =
  8. 8.6 × 19 =
  9. 9.6 × 9 =
  10. 10.9 × 29 =
  11. 11.25 × 99 =
  12. 12.12 × 9 =
  13. 13.33 × 99 =
  14. 14.13 × 19 =
  15. 15.21 × 99 =
  16. 16.12 × 9 =
  17. 17.11 × 19 =
  18. 18.14 × 19 =
  19. 19.10 × 9 =
  20. 20.4 × 9 =
  21. 21.4 × 29 =
  22. 22.3 × 19 =
  23. 23.11 × 29 =
  24. 24.3 × 49 =
  25. 25.39 × 98 =
  26. 26.7 × 9 =
  27. 27.17 × 99 =
  28. 28.3 × 49 =
  29. 29.4 × 29 =
  30. 30.10 × 98 =
  31. 31.9 × 29 =
  32. 32.4 × 9 =
  33. 33.6 × 19 =
  34. 34.8 × 49 =
  35. 35.15 × 9 =
  36. 36.8 × 9 =
  37. 37.3 × 19 =
  38. 38.13 × 98 =
  39. 39.5 × 19 =
  40. 40.3 × 29 =

Answer key

  1. 3136
  2. 27
  3. 147
  4. 209
  5. 441
  6. 539
  7. 45
  8. 114
  9. 54
  10. 261
  11. 2475
  12. 108
  13. 3267
  14. 247
  15. 2079
  16. 108
  17. 209
  18. 266
  19. 90
  20. 36
  21. 116
  22. 57
  23. 319
  24. 147
  25. 3822
  26. 63
  27. 1683
  28. 147
  29. 116
  30. 980
  31. 261
  32. 36
  33. 114
  34. 392
  35. 135
  36. 72
  37. 57
  38. 1274
  39. 95
  40. 87

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