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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 769 · 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. 1.73 × 8 =
  2. 2.104 × 4 =
  3. 3.135 × 4 =
  4. 4.78 × 4 =
  5. 5.45 × 8 =
  6. 6.28 × 8 =
  7. 7.51 × 8 =
  8. 8.62 × 8 =
  9. 9.20 × 4 =
  10. 10.27 × 8 =
  11. 11.27 × 4 =
  12. 12.153 × 4 =
  13. 13.72 × 4 =
  14. 14.19 × 4 =
  15. 15.45 × 8 =
  16. 16.128 × 4 =
  17. 17.44 × 8 =
  18. 18.31 × 4 =
  19. 19.24 × 8 =
  20. 20.14 × 4 =
  21. 21.136 × 4 =
  22. 22.149 × 4 =
  23. 23.19 × 8 =
  24. 24.136 × 4 =
  25. 25.37 × 8 =
  26. 26.17 × 8 =
  27. 27.58 × 8 =
  28. 28.41 × 8 =
  29. 29.38 × 4 =
  30. 30.31 × 8 =
  31. 31.31 × 8 =
  32. 32.60 × 4 =
  33. 33.147 × 4 =
  34. 34.38 × 8 =
  35. 35.133 × 4 =
  36. 36.28 × 8 =
  37. 37.17 × 8 =
  38. 38.29 × 8 =
  39. 39.70 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 584
  2. 416
  3. 540
  4. 312
  5. 360
  6. 224
  7. 408
  8. 496
  9. 80
  10. 216
  11. 108
  12. 612
  13. 288
  14. 76
  15. 360
  16. 512
  17. 352
  18. 124
  19. 192
  20. 56
  21. 544
  22. 596
  23. 152
  24. 544
  25. 296
  26. 136
  27. 464
  28. 328
  29. 152
  30. 248
  31. 248
  32. 240
  33. 588
  34. 304
  35. 532
  36. 224
  37. 136
  38. 232
  39. 560
  40. 288

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