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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 981 · 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. 1.21 × 4 =
  2. 2.13 × 8 =
  3. 3.22 × 8 =
  4. 4.118 × 4 =
  5. 5.63 × 8 =
  6. 6.48 × 8 =
  7. 7.74 × 4 =
  8. 8.76 × 4 =
  9. 9.34 × 4 =
  10. 10.39 × 8 =
  11. 11.47 × 4 =
  12. 12.73 × 8 =
  13. 13.39 × 8 =
  14. 14.54 × 8 =
  15. 15.40 × 8 =
  16. 16.141 × 4 =
  17. 17.18 × 4 =
  18. 18.116 × 4 =
  19. 19.72 × 8 =
  20. 20.115 × 4 =
  21. 21.55 × 8 =
  22. 22.32 × 8 =
  23. 23.49 × 8 =
  24. 24.59 × 8 =
  25. 25.47 × 4 =
  26. 26.117 × 4 =
  27. 27.77 × 4 =
  28. 28.153 × 4 =
  29. 29.124 × 4 =
  30. 30.48 × 8 =
  31. 31.69 × 4 =
  32. 32.61 × 8 =
  33. 33.60 × 8 =
  34. 34.65 × 8 =
  35. 35.44 × 8 =
  36. 36.48 × 4 =
  37. 37.53 × 4 =
  38. 38.12 × 8 =
  39. 39.124 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 84
  2. 104
  3. 176
  4. 472
  5. 504
  6. 384
  7. 296
  8. 304
  9. 136
  10. 312
  11. 188
  12. 584
  13. 312
  14. 432
  15. 320
  16. 564
  17. 72
  18. 464
  19. 576
  20. 460
  21. 440
  22. 256
  23. 392
  24. 472
  25. 188
  26. 468
  27. 308
  28. 612
  29. 496
  30. 384
  31. 276
  32. 488
  33. 480
  34. 520
  35. 352
  36. 192
  37. 212
  38. 96
  39. 496
  40. 100

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