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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 27 · 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. 1.63 × 8 =
  2. 2.41 × 8 =
  3. 3.47 × 4 =
  4. 4.30 × 8 =
  5. 5.25 × 8 =
  6. 6.21 × 4 =
  7. 7.116 × 4 =
  8. 8.66 × 8 =
  9. 9.61 × 8 =
  10. 10.38 × 4 =
  11. 11.28 × 8 =
  12. 12.94 × 4 =
  13. 13.49 × 4 =
  14. 14.157 × 4 =
  15. 15.20 × 8 =
  16. 16.89 × 4 =
  17. 17.107 × 4 =
  18. 18.108 × 4 =
  19. 19.30 × 8 =
  20. 20.32 × 4 =
  21. 21.16 × 8 =
  22. 22.62 × 8 =
  23. 23.80 × 4 =
  24. 24.59 × 4 =
  25. 25.39 × 8 =
  26. 26.36 × 4 =
  27. 27.79 × 4 =
  28. 28.50 × 4 =
  29. 29.51 × 8 =
  30. 30.60 × 4 =
  31. 31.130 × 4 =
  32. 32.42 × 4 =
  33. 33.68 × 8 =
  34. 34.28 × 4 =
  35. 35.58 × 4 =
  36. 36.105 × 4 =
  37. 37.52 × 4 =
  38. 38.53 × 8 =
  39. 39.18 × 4 =
  40. 40.42 × 8 =

Answer key

  1. 504
  2. 328
  3. 188
  4. 240
  5. 200
  6. 84
  7. 464
  8. 528
  9. 488
  10. 152
  11. 224
  12. 376
  13. 196
  14. 628
  15. 160
  16. 356
  17. 428
  18. 432
  19. 240
  20. 128
  21. 128
  22. 496
  23. 320
  24. 236
  25. 312
  26. 144
  27. 316
  28. 200
  29. 408
  30. 240
  31. 520
  32. 168
  33. 544
  34. 112
  35. 232
  36. 420
  37. 208
  38. 424
  39. 72
  40. 336

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