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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 614 · 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. 1.40 × 98 =
  2. 2.12 × 49 =
  3. 3.11 × 19 =
  4. 4.8 × 98 =
  5. 5.6 × 49 =
  6. 6.20 × 99 =
  7. 7.10 × 19 =
  8. 8.12 × 49 =
  9. 9.10 × 19 =
  10. 10.35 × 98 =
  11. 11.39 × 98 =
  12. 12.14 × 19 =
  13. 13.5 × 9 =
  14. 14.12 × 19 =
  15. 15.13 × 29 =
  16. 16.9 × 29 =
  17. 17.4 × 19 =
  18. 18.15 × 49 =
  19. 19.13 × 9 =
  20. 20.5 × 29 =
  21. 21.13 × 9 =
  22. 22.8 × 19 =
  23. 23.8 × 19 =
  24. 24.6 × 19 =
  25. 25.7 × 98 =
  26. 26.18 × 99 =
  27. 27.10 × 9 =
  28. 28.13 × 9 =
  29. 29.3 × 19 =
  30. 30.34 × 98 =
  31. 31.34 × 98 =
  32. 32.36 × 99 =
  33. 33.31 × 99 =
  34. 34.15 × 9 =
  35. 35.6 × 9 =
  36. 36.15 × 9 =
  37. 37.13 × 9 =
  38. 38.9 × 29 =
  39. 39.24 × 98 =
  40. 40.14 × 49 =

Answer key

  1. 3920
  2. 588
  3. 209
  4. 784
  5. 294
  6. 1980
  7. 190
  8. 588
  9. 190
  10. 3430
  11. 3822
  12. 266
  13. 45
  14. 228
  15. 377
  16. 261
  17. 76
  18. 735
  19. 117
  20. 145
  21. 117
  22. 152
  23. 152
  24. 114
  25. 686
  26. 1782
  27. 90
  28. 117
  29. 57
  30. 3332
  31. 3332
  32. 3564
  33. 3069
  34. 135
  35. 54
  36. 135
  37. 117
  38. 261
  39. 2352
  40. 686

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