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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 660 · 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. 1.147 × 4 =
  2. 2.12 × 8 =
  3. 3.12 × 8 =
  4. 4.21 × 8 =
  5. 5.143 × 4 =
  6. 6.65 × 8 =
  7. 7.95 × 4 =
  8. 8.12 × 8 =
  9. 9.52 × 4 =
  10. 10.33 × 8 =
  11. 11.66 × 4 =
  12. 12.35 × 8 =
  13. 13.16 × 4 =
  14. 14.90 × 4 =
  15. 15.47 × 4 =
  16. 16.30 × 8 =
  17. 17.48 × 4 =
  18. 18.62 × 8 =
  19. 19.48 × 4 =
  20. 20.114 × 4 =
  21. 21.13 × 8 =
  22. 22.126 × 4 =
  23. 23.30 × 4 =
  24. 24.55 × 8 =
  25. 25.129 × 4 =
  26. 26.65 × 8 =
  27. 27.38 × 8 =
  28. 28.85 × 4 =
  29. 29.64 × 8 =
  30. 30.81 × 4 =
  31. 31.47 × 8 =
  32. 32.26 × 8 =
  33. 33.18 × 8 =
  34. 34.34 × 8 =
  35. 35.27 × 8 =
  36. 36.74 × 8 =
  37. 37.71 × 8 =
  38. 38.160 × 4 =
  39. 39.16 × 4 =
  40. 40.136 × 4 =

Answer key

  1. 588
  2. 96
  3. 96
  4. 168
  5. 572
  6. 520
  7. 380
  8. 96
  9. 208
  10. 264
  11. 264
  12. 280
  13. 64
  14. 360
  15. 188
  16. 240
  17. 192
  18. 496
  19. 192
  20. 456
  21. 104
  22. 504
  23. 120
  24. 440
  25. 516
  26. 520
  27. 304
  28. 340
  29. 512
  30. 324
  31. 376
  32. 208
  33. 144
  34. 272
  35. 216
  36. 592
  37. 568
  38. 640
  39. 64
  40. 544

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