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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 988 · 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. 2.8 × 9 =
  3. 3.12 × 9 =
  4. 4.3 × 9 =
  5. 5.25 × 98 =
  6. 6.6 × 19 =
  7. 7.13 × 98 =
  8. 8.8 × 99 =
  9. 9.33 × 98 =
  10. 10.14 × 29 =
  11. 11.10 × 9 =
  12. 12.3 × 49 =
  13. 13.5 × 9 =
  14. 14.14 × 9 =
  15. 15.30 × 99 =
  16. 16.15 × 98 =
  17. 17.23 × 99 =
  18. 18.30 × 99 =
  19. 19.24 × 99 =
  20. 20.12 × 9 =
  21. 21.7 × 49 =
  22. 22.4 × 29 =
  23. 23.10 × 9 =
  24. 24.11 × 29 =
  25. 25.3 × 29 =
  26. 26.27 × 98 =
  27. 27.7 × 29 =
  28. 28.9 × 98 =
  29. 29.10 × 29 =
  30. 30.14 × 29 =
  31. 31.19 × 98 =
  32. 32.40 × 98 =
  33. 33.6 × 9 =
  34. 34.3 × 9 =
  35. 35.19 × 99 =
  36. 36.7 × 49 =
  37. 37.14 × 98 =
  38. 38.38 × 98 =
  39. 39.10 × 19 =
  40. 40.9 × 29 =

Answer key

  1. 45
  2. 72
  3. 108
  4. 27
  5. 2450
  6. 114
  7. 1274
  8. 792
  9. 3234
  10. 406
  11. 90
  12. 147
  13. 45
  14. 126
  15. 2970
  16. 1470
  17. 2277
  18. 2970
  19. 2376
  20. 108
  21. 343
  22. 116
  23. 90
  24. 319
  25. 87
  26. 2646
  27. 203
  28. 882
  29. 290
  30. 406
  31. 1862
  32. 3920
  33. 54
  34. 27
  35. 1881
  36. 343
  37. 1372
  38. 3724
  39. 190
  40. 261

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