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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 494 · 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. 1.138 × 4 =
  2. 2.37 × 4 =
  3. 3.42 × 8 =
  4. 4.47 × 8 =
  5. 5.46 × 4 =
  6. 6.122 × 4 =
  7. 7.64 × 4 =
  8. 8.17 × 8 =
  9. 9.90 × 4 =
  10. 10.57 × 8 =
  11. 11.74 × 8 =
  12. 12.31 × 8 =
  13. 13.70 × 8 =
  14. 14.149 × 4 =
  15. 15.58 × 8 =
  16. 16.147 × 4 =
  17. 17.18 × 4 =
  18. 18.72 × 8 =
  19. 19.117 × 4 =
  20. 20.66 × 4 =
  21. 21.61 × 8 =
  22. 22.52 × 8 =
  23. 23.48 × 4 =
  24. 24.144 × 4 =
  25. 25.36 × 8 =
  26. 26.45 × 8 =
  27. 27.113 × 4 =
  28. 28.73 × 8 =
  29. 29.78 × 4 =
  30. 30.26 × 4 =
  31. 31.39 × 4 =
  32. 32.13 × 4 =
  33. 33.31 × 4 =
  34. 34.117 × 4 =
  35. 35.37 × 4 =
  36. 36.59 × 8 =
  37. 37.127 × 4 =
  38. 38.73 × 8 =
  39. 39.69 × 8 =
  40. 40.110 × 4 =

Answer key

  1. 552
  2. 148
  3. 336
  4. 376
  5. 184
  6. 488
  7. 256
  8. 136
  9. 360
  10. 456
  11. 592
  12. 248
  13. 560
  14. 596
  15. 464
  16. 588
  17. 72
  18. 576
  19. 468
  20. 264
  21. 488
  22. 416
  23. 192
  24. 576
  25. 288
  26. 360
  27. 452
  28. 584
  29. 312
  30. 104
  31. 156
  32. 52
  33. 124
  34. 468
  35. 148
  36. 472
  37. 508
  38. 584
  39. 552
  40. 440

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