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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 214 · 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. 1.135 × 4 =
  2. 2.37 × 4 =
  3. 3.81 × 4 =
  4. 4.49 × 4 =
  5. 5.62 × 4 =
  6. 6.23 × 4 =
  7. 7.28 × 8 =
  8. 8.30 × 8 =
  9. 9.84 × 4 =
  10. 10.48 × 8 =
  11. 11.19 × 4 =
  12. 12.78 × 4 =
  13. 13.135 × 4 =
  14. 14.94 × 4 =
  15. 15.32 × 4 =
  16. 16.119 × 4 =
  17. 17.15 × 8 =
  18. 18.67 × 8 =
  19. 19.148 × 4 =
  20. 20.51 × 4 =
  21. 21.81 × 4 =
  22. 22.20 × 8 =
  23. 23.74 × 8 =
  24. 24.17 × 8 =
  25. 25.65 × 8 =
  26. 26.64 × 8 =
  27. 27.42 × 8 =
  28. 28.64 × 8 =
  29. 29.72 × 4 =
  30. 30.27 × 8 =
  31. 31.58 × 8 =
  32. 32.29 × 8 =
  33. 33.109 × 4 =
  34. 34.36 × 4 =
  35. 35.116 × 4 =
  36. 36.53 × 8 =
  37. 37.119 × 4 =
  38. 38.109 × 4 =
  39. 39.62 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 540
  2. 148
  3. 324
  4. 196
  5. 248
  6. 92
  7. 224
  8. 240
  9. 336
  10. 384
  11. 76
  12. 312
  13. 540
  14. 376
  15. 128
  16. 476
  17. 120
  18. 536
  19. 592
  20. 204
  21. 324
  22. 160
  23. 592
  24. 136
  25. 520
  26. 512
  27. 336
  28. 512
  29. 288
  30. 216
  31. 464
  32. 232
  33. 436
  34. 144
  35. 464
  36. 424
  37. 476
  38. 436
  39. 248
  40. 312

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