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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 552 · 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. 1.11 × 99 =
  2. 2.7 × 9 =
  3. 3.3 × 49 =
  4. 4.14 × 19 =
  5. 5.5 × 9 =
  6. 6.25 × 99 =
  7. 7.15 × 9 =
  8. 8.4 × 49 =
  9. 9.4 × 19 =
  10. 10.8 × 98 =
  11. 11.5 × 9 =
  12. 12.26 × 98 =
  13. 13.11 × 19 =
  14. 14.14 × 29 =
  15. 15.6 × 9 =
  16. 16.12 × 29 =
  17. 17.6 × 19 =
  18. 18.12 × 49 =
  19. 19.15 × 99 =
  20. 20.15 × 9 =
  21. 21.4 × 29 =
  22. 22.13 × 49 =
  23. 23.9 × 9 =
  24. 24.39 × 99 =
  25. 25.13 × 19 =
  26. 26.14 × 49 =
  27. 27.35 × 98 =
  28. 28.12 × 49 =
  29. 29.14 × 19 =
  30. 30.5 × 99 =
  31. 31.10 × 9 =
  32. 32.14 × 29 =
  33. 33.33 × 98 =
  34. 34.5 × 9 =
  35. 35.3 × 29 =
  36. 36.7 × 49 =
  37. 37.3 × 9 =
  38. 38.27 × 98 =
  39. 39.4 × 98 =
  40. 40.7 × 29 =

Answer key

  1. 1089
  2. 63
  3. 147
  4. 266
  5. 45
  6. 2475
  7. 135
  8. 196
  9. 76
  10. 784
  11. 45
  12. 2548
  13. 209
  14. 406
  15. 54
  16. 348
  17. 114
  18. 588
  19. 1485
  20. 135
  21. 116
  22. 637
  23. 81
  24. 3861
  25. 247
  26. 686
  27. 3430
  28. 588
  29. 266
  30. 495
  31. 90
  32. 406
  33. 3234
  34. 45
  35. 87
  36. 343
  37. 27
  38. 2646
  39. 392
  40. 203

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