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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 408 · 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. 1.25 × 99 =
  2. 2.11 × 29 =
  3. 3.3 × 9 =
  4. 4.15 × 19 =
  5. 5.15 × 49 =
  6. 6.4 × 29 =
  7. 7.11 × 19 =
  8. 8.7 × 19 =
  9. 9.14 × 49 =
  10. 10.36 × 98 =
  11. 11.3 × 9 =
  12. 12.11 × 29 =
  13. 13.21 × 99 =
  14. 14.15 × 19 =
  15. 15.15 × 9 =
  16. 16.33 × 99 =
  17. 17.30 × 98 =
  18. 18.15 × 9 =
  19. 19.5 × 29 =
  20. 20.9 × 49 =
  21. 21.11 × 49 =
  22. 22.7 × 9 =
  23. 23.4 × 49 =
  24. 24.13 × 29 =
  25. 25.8 × 29 =
  26. 26.10 × 9 =
  27. 27.12 × 9 =
  28. 28.9 × 19 =
  29. 29.19 × 99 =
  30. 30.32 × 98 =
  31. 31.6 × 19 =
  32. 32.15 × 29 =
  33. 33.7 × 19 =
  34. 34.6 × 19 =
  35. 35.12 × 49 =
  36. 36.15 × 49 =
  37. 37.3 × 19 =
  38. 38.4 × 9 =
  39. 39.5 × 19 =
  40. 40.15 × 29 =

Answer key

  1. 2475
  2. 319
  3. 27
  4. 285
  5. 735
  6. 116
  7. 209
  8. 133
  9. 686
  10. 3528
  11. 27
  12. 319
  13. 2079
  14. 285
  15. 135
  16. 3267
  17. 2940
  18. 135
  19. 145
  20. 441
  21. 539
  22. 63
  23. 196
  24. 377
  25. 232
  26. 90
  27. 108
  28. 171
  29. 1881
  30. 3136
  31. 114
  32. 435
  33. 133
  34. 114
  35. 588
  36. 735
  37. 57
  38. 36
  39. 95
  40. 435

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