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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 266 · 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. 1.12 × 49 =
  2. 2.39 × 98 =
  3. 3.3 × 49 =
  4. 4.5 × 9 =
  5. 5.4 × 9 =
  6. 6.12 × 29 =
  7. 7.11 × 49 =
  8. 8.5 × 99 =
  9. 9.10 × 49 =
  10. 10.7 × 9 =
  11. 11.11 × 29 =
  12. 12.13 × 29 =
  13. 13.8 × 9 =
  14. 14.13 × 9 =
  15. 15.15 × 19 =
  16. 16.14 × 29 =
  17. 17.4 × 9 =
  18. 18.8 × 9 =
  19. 19.11 × 9 =
  20. 20.4 × 49 =
  21. 21.13 × 29 =
  22. 22.38 × 98 =
  23. 23.12 × 98 =
  24. 24.13 × 19 =
  25. 25.16 × 98 =
  26. 26.9 × 19 =
  27. 27.13 × 49 =
  28. 28.24 × 98 =
  29. 29.9 × 19 =
  30. 30.4 × 49 =
  31. 31.17 × 98 =
  32. 32.5 × 19 =
  33. 33.39 × 99 =
  34. 34.13 × 9 =
  35. 35.11 × 19 =
  36. 36.3 × 29 =
  37. 37.8 × 99 =
  38. 38.36 × 98 =
  39. 39.22 × 99 =
  40. 40.39 × 98 =

Answer key

  1. 588
  2. 3822
  3. 147
  4. 45
  5. 36
  6. 348
  7. 539
  8. 495
  9. 490
  10. 63
  11. 319
  12. 377
  13. 72
  14. 117
  15. 285
  16. 406
  17. 36
  18. 72
  19. 99
  20. 196
  21. 377
  22. 3724
  23. 1176
  24. 247
  25. 1568
  26. 171
  27. 637
  28. 2352
  29. 171
  30. 196
  31. 1666
  32. 95
  33. 3861
  34. 117
  35. 209
  36. 87
  37. 792
  38. 3528
  39. 2178
  40. 3822

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