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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 897 · 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 × 49 =
  2. 2.6 × 9 =
  3. 3.5 × 9 =
  4. 4.7 × 19 =
  5. 5.3 × 29 =
  6. 6.20 × 98 =
  7. 7.9 × 19 =
  8. 8.11 × 9 =
  9. 9.30 × 99 =
  10. 10.15 × 9 =
  11. 11.8 × 49 =
  12. 12.12 × 9 =
  13. 13.33 × 99 =
  14. 14.13 × 9 =
  15. 15.6 × 29 =
  16. 16.6 × 9 =
  17. 17.19 × 99 =
  18. 18.5 × 49 =
  19. 19.14 × 98 =
  20. 20.14 × 29 =
  21. 21.3 × 49 =
  22. 22.6 × 9 =
  23. 23.5 × 9 =
  24. 24.29 × 98 =
  25. 25.9 × 9 =
  26. 26.8 × 9 =
  27. 27.5 × 19 =
  28. 28.8 × 99 =
  29. 29.12 × 49 =
  30. 30.4 × 99 =
  31. 31.7 × 19 =
  32. 32.9 × 29 =
  33. 33.38 × 99 =
  34. 34.4 × 9 =
  35. 35.14 × 49 =
  36. 36.8 × 29 =
  37. 37.11 × 29 =
  38. 38.13 × 9 =
  39. 39.10 × 19 =
  40. 40.13 × 29 =

Answer key

  1. 147
  2. 54
  3. 45
  4. 133
  5. 87
  6. 1960
  7. 171
  8. 99
  9. 2970
  10. 135
  11. 392
  12. 108
  13. 3267
  14. 117
  15. 174
  16. 54
  17. 1881
  18. 245
  19. 1372
  20. 406
  21. 147
  22. 54
  23. 45
  24. 2842
  25. 81
  26. 72
  27. 95
  28. 792
  29. 588
  30. 396
  31. 133
  32. 261
  33. 3762
  34. 36
  35. 686
  36. 232
  37. 319
  38. 117
  39. 190
  40. 377

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