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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 982 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.107 × 4 =
  2. 2.47 × 8 =
  3. 3.67 × 8 =
  4. 4.142 × 4 =
  5. 5.129 × 4 =
  6. 6.72 × 8 =
  7. 7.60 × 8 =
  8. 8.27 × 4 =
  9. 9.47 × 8 =
  10. 10.13 × 8 =
  11. 11.38 × 8 =
  12. 12.16 × 4 =
  13. 13.34 × 8 =
  14. 14.43 × 4 =
  15. 15.105 × 4 =
  16. 16.124 × 4 =
  17. 17.79 × 4 =
  18. 18.42 × 4 =
  19. 19.78 × 4 =
  20. 20.159 × 4 =
  21. 21.69 × 8 =
  22. 22.139 × 4 =
  23. 23.34 × 4 =
  24. 24.43 × 4 =
  25. 25.23 × 8 =
  26. 26.51 × 4 =
  27. 27.15 × 4 =
  28. 28.141 × 4 =
  29. 29.55 × 8 =
  30. 30.13 × 4 =
  31. 31.59 × 4 =
  32. 32.132 × 4 =
  33. 33.59 × 8 =
  34. 34.83 × 4 =
  35. 35.71 × 8 =
  36. 36.141 × 4 =
  37. 37.37 × 8 =
  38. 38.77 × 4 =
  39. 39.29 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 428
  2. 376
  3. 536
  4. 568
  5. 516
  6. 576
  7. 480
  8. 108
  9. 376
  10. 104
  11. 304
  12. 64
  13. 272
  14. 172
  15. 420
  16. 496
  17. 316
  18. 168
  19. 312
  20. 636
  21. 552
  22. 556
  23. 136
  24. 172
  25. 184
  26. 204
  27. 60
  28. 564
  29. 440
  30. 52
  31. 236
  32. 528
  33. 472
  34. 332
  35. 568
  36. 564
  37. 296
  38. 308
  39. 116
  40. 256

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