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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 520 · 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. 1.10 × 9 =
  2. 2.11 × 29 =
  3. 3.6 × 49 =
  4. 4.13 × 19 =
  5. 5.12 × 49 =
  6. 6.19 × 98 =
  7. 7.5 × 99 =
  8. 8.14 × 29 =
  9. 9.7 × 9 =
  10. 10.9 × 99 =
  11. 11.32 × 98 =
  12. 12.6 × 98 =
  13. 13.12 × 19 =
  14. 14.13 × 19 =
  15. 15.13 × 29 =
  16. 16.33 × 99 =
  17. 17.11 × 29 =
  18. 18.40 × 99 =
  19. 19.12 × 29 =
  20. 20.14 × 19 =
  21. 21.8 × 19 =
  22. 22.7 × 9 =
  23. 23.8 × 9 =
  24. 24.34 × 98 =
  25. 25.4 × 29 =
  26. 26.14 × 99 =
  27. 27.13 × 9 =
  28. 28.8 × 29 =
  29. 29.39 × 99 =
  30. 30.12 × 29 =
  31. 31.28 × 99 =
  32. 32.3 × 19 =
  33. 33.26 × 98 =
  34. 34.15 × 29 =
  35. 35.9 × 99 =
  36. 36.11 × 9 =
  37. 37.3 × 19 =
  38. 38.13 × 29 =
  39. 39.11 × 9 =
  40. 40.11 × 49 =

Answer key

  1. 90
  2. 319
  3. 294
  4. 247
  5. 588
  6. 1862
  7. 495
  8. 406
  9. 63
  10. 891
  11. 3136
  12. 588
  13. 228
  14. 247
  15. 377
  16. 3267
  17. 319
  18. 3960
  19. 348
  20. 266
  21. 152
  22. 63
  23. 72
  24. 3332
  25. 116
  26. 1386
  27. 117
  28. 232
  29. 3861
  30. 348
  31. 2772
  32. 57
  33. 2548
  34. 435
  35. 891
  36. 99
  37. 57
  38. 377
  39. 99
  40. 539

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