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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 830 · 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 × 9 =
  2. 2.39 × 98 =
  3. 3.11 × 49 =
  4. 4.3 × 98 =
  5. 5.17 × 99 =
  6. 6.8 × 98 =
  7. 7.23 × 99 =
  8. 8.5 × 99 =
  9. 9.20 × 98 =
  10. 10.5 × 49 =
  11. 11.9 × 9 =
  12. 12.18 × 99 =
  13. 13.9 × 29 =
  14. 14.4 × 9 =
  15. 15.7 × 19 =
  16. 16.12 × 19 =
  17. 17.33 × 99 =
  18. 18.6 × 29 =
  19. 19.5 × 29 =
  20. 20.4 × 29 =
  21. 21.12 × 49 =
  22. 22.5 × 19 =
  23. 23.15 × 9 =
  24. 24.15 × 19 =
  25. 25.4 × 29 =
  26. 26.8 × 29 =
  27. 27.13 × 49 =
  28. 28.26 × 99 =
  29. 29.17 × 99 =
  30. 30.14 × 19 =
  31. 31.15 × 19 =
  32. 32.24 × 98 =
  33. 33.6 × 9 =
  34. 34.10 × 29 =
  35. 35.7 × 9 =
  36. 36.12 × 49 =
  37. 37.4 × 49 =
  38. 38.7 × 29 =
  39. 39.31 × 99 =
  40. 40.3 × 9 =

Answer key

  1. 27
  2. 3822
  3. 539
  4. 294
  5. 1683
  6. 784
  7. 2277
  8. 495
  9. 1960
  10. 245
  11. 81
  12. 1782
  13. 261
  14. 36
  15. 133
  16. 228
  17. 3267
  18. 174
  19. 145
  20. 116
  21. 588
  22. 95
  23. 135
  24. 285
  25. 116
  26. 232
  27. 637
  28. 2574
  29. 1683
  30. 266
  31. 285
  32. 2352
  33. 54
  34. 290
  35. 63
  36. 588
  37. 196
  38. 203
  39. 3069
  40. 27

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