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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 411 · 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. 1.3 × 99 =
  2. 2.37 × 99 =
  3. 3.9 × 19 =
  4. 4.11 × 98 =
  5. 5.10 × 19 =
  6. 6.3 × 9 =
  7. 7.6 × 29 =
  8. 8.12 × 49 =
  9. 9.8 × 9 =
  10. 10.4 × 29 =
  11. 11.25 × 99 =
  12. 12.6 × 49 =
  13. 13.11 × 49 =
  14. 14.12 × 29 =
  15. 15.3 × 99 =
  16. 16.5 × 49 =
  17. 17.3 × 19 =
  18. 18.4 × 99 =
  19. 19.23 × 98 =
  20. 20.31 × 98 =
  21. 21.8 × 19 =
  22. 22.37 × 99 =
  23. 23.12 × 9 =
  24. 24.5 × 98 =
  25. 25.25 × 99 =
  26. 26.4 × 49 =
  27. 27.9 × 49 =
  28. 28.3 × 99 =
  29. 29.5 × 19 =
  30. 30.15 × 29 =
  31. 31.3 × 19 =
  32. 32.12 × 9 =
  33. 33.15 × 9 =
  34. 34.11 × 49 =
  35. 35.11 × 19 =
  36. 36.11 × 19 =
  37. 37.15 × 19 =
  38. 38.12 × 29 =
  39. 39.4 × 19 =
  40. 40.6 × 9 =

Answer key

  1. 297
  2. 3663
  3. 171
  4. 1078
  5. 190
  6. 27
  7. 174
  8. 588
  9. 72
  10. 116
  11. 2475
  12. 294
  13. 539
  14. 348
  15. 297
  16. 245
  17. 57
  18. 396
  19. 2254
  20. 3038
  21. 152
  22. 3663
  23. 108
  24. 490
  25. 2475
  26. 196
  27. 441
  28. 297
  29. 95
  30. 435
  31. 57
  32. 108
  33. 135
  34. 539
  35. 209
  36. 209
  37. 285
  38. 348
  39. 76
  40. 54

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