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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 915 · 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 × 29 =
  2. 2.35 × 99 =
  3. 3.6 × 98 =
  4. 4.15 × 29 =
  5. 5.9 × 99 =
  6. 6.3 × 29 =
  7. 7.13 × 9 =
  8. 8.12 × 99 =
  9. 9.9 × 29 =
  10. 10.4 × 9 =
  11. 11.5 × 98 =
  12. 12.8 × 19 =
  13. 13.10 × 99 =
  14. 14.8 × 19 =
  15. 15.9 × 29 =
  16. 16.10 × 9 =
  17. 17.9 × 19 =
  18. 18.8 × 99 =
  19. 19.12 × 49 =
  20. 20.15 × 49 =
  21. 21.5 × 9 =
  22. 22.28 × 99 =
  23. 23.11 × 9 =
  24. 24.23 × 98 =
  25. 25.11 × 29 =
  26. 26.13 × 29 =
  27. 27.4 × 9 =
  28. 28.4 × 98 =
  29. 29.14 × 98 =
  30. 30.21 × 99 =
  31. 31.23 × 99 =
  32. 32.27 × 99 =
  33. 33.14 × 9 =
  34. 34.36 × 99 =
  35. 35.5 × 19 =
  36. 36.10 × 19 =
  37. 37.13 × 9 =
  38. 38.19 × 98 =
  39. 39.15 × 49 =
  40. 40.8 × 29 =

Answer key

  1. 87
  2. 3465
  3. 588
  4. 435
  5. 891
  6. 87
  7. 117
  8. 1188
  9. 261
  10. 36
  11. 490
  12. 152
  13. 990
  14. 152
  15. 261
  16. 90
  17. 171
  18. 792
  19. 588
  20. 735
  21. 45
  22. 2772
  23. 99
  24. 2254
  25. 319
  26. 377
  27. 36
  28. 392
  29. 1372
  30. 2079
  31. 2277
  32. 2673
  33. 126
  34. 3564
  35. 95
  36. 190
  37. 117
  38. 1862
  39. 735
  40. 232

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