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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 977 · 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. 1.5 × 9 =
  2. 2.9 × 49 =
  3. 3.17 × 99 =
  4. 4.8 × 19 =
  5. 5.12 × 49 =
  6. 6.3 × 9 =
  7. 7.11 × 19 =
  8. 8.13 × 49 =
  9. 9.5 × 9 =
  10. 10.11 × 19 =
  11. 11.9 × 29 =
  12. 12.10 × 9 =
  13. 13.28 × 99 =
  14. 14.3 × 9 =
  15. 15.5 × 9 =
  16. 16.14 × 19 =
  17. 17.17 × 99 =
  18. 18.3 × 29 =
  19. 19.11 × 98 =
  20. 20.6 × 49 =
  21. 21.14 × 19 =
  22. 22.8 × 19 =
  23. 23.11 × 98 =
  24. 24.11 × 19 =
  25. 25.3 × 49 =
  26. 26.13 × 49 =
  27. 27.9 × 19 =
  28. 28.14 × 98 =
  29. 29.7 × 9 =
  30. 30.3 × 49 =
  31. 31.8 × 9 =
  32. 32.3 × 19 =
  33. 33.7 × 98 =
  34. 34.13 × 29 =
  35. 35.17 × 98 =
  36. 36.6 × 9 =
  37. 37.12 × 99 =
  38. 38.12 × 29 =
  39. 39.6 × 9 =
  40. 40.6 × 99 =

Answer key

  1. 45
  2. 441
  3. 1683
  4. 152
  5. 588
  6. 27
  7. 209
  8. 637
  9. 45
  10. 209
  11. 261
  12. 90
  13. 2772
  14. 27
  15. 45
  16. 266
  17. 1683
  18. 87
  19. 1078
  20. 294
  21. 266
  22. 152
  23. 1078
  24. 209
  25. 147
  26. 637
  27. 171
  28. 1372
  29. 63
  30. 147
  31. 72
  32. 57
  33. 686
  34. 377
  35. 1666
  36. 54
  37. 1188
  38. 348
  39. 54
  40. 594

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