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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 324 · 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. 1.25 × 8 =
  2. 2.45 × 8 =
  3. 3.54 × 4 =
  4. 4.28 × 4 =
  5. 5.83 × 4 =
  6. 6.23 × 8 =
  7. 7.81 × 4 =
  8. 8.65 × 4 =
  9. 9.80 × 4 =
  10. 10.136 × 4 =
  11. 11.33 × 8 =
  12. 12.41 × 8 =
  13. 13.19 × 8 =
  14. 14.21 × 4 =
  15. 15.47 × 8 =
  16. 16.57 × 4 =
  17. 17.12 × 8 =
  18. 18.39 × 4 =
  19. 19.135 × 4 =
  20. 20.144 × 4 =
  21. 21.67 × 4 =
  22. 22.89 × 4 =
  23. 23.14 × 8 =
  24. 24.84 × 4 =
  25. 25.98 × 4 =
  26. 26.41 × 8 =
  27. 27.83 × 4 =
  28. 28.130 × 4 =
  29. 29.23 × 8 =
  30. 30.152 × 4 =
  31. 31.132 × 4 =
  32. 32.15 × 4 =
  33. 33.28 × 8 =
  34. 34.61 × 8 =
  35. 35.20 × 8 =
  36. 36.64 × 8 =
  37. 37.13 × 8 =
  38. 38.16 × 4 =
  39. 39.16 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 200
  2. 360
  3. 216
  4. 112
  5. 332
  6. 184
  7. 324
  8. 260
  9. 320
  10. 544
  11. 264
  12. 328
  13. 152
  14. 84
  15. 376
  16. 228
  17. 96
  18. 156
  19. 540
  20. 576
  21. 268
  22. 356
  23. 112
  24. 336
  25. 392
  26. 328
  27. 332
  28. 520
  29. 184
  30. 608
  31. 528
  32. 60
  33. 224
  34. 488
  35. 160
  36. 512
  37. 104
  38. 64
  39. 128
  40. 168

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