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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 16 · 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. 1.30 × 4 =
  2. 2.45 × 8 =
  3. 3.39 × 8 =
  4. 4.154 × 4 =
  5. 5.27 × 4 =
  6. 6.45 × 8 =
  7. 7.13 × 8 =
  8. 8.84 × 4 =
  9. 9.85 × 4 =
  10. 10.16 × 4 =
  11. 11.46 × 8 =
  12. 12.62 × 8 =
  13. 13.79 × 4 =
  14. 14.22 × 8 =
  15. 15.72 × 8 =
  16. 16.38 × 4 =
  17. 17.47 × 8 =
  18. 18.157 × 4 =
  19. 19.70 × 8 =
  20. 20.87 × 4 =
  21. 21.37 × 4 =
  22. 22.126 × 4 =
  23. 23.49 × 4 =
  24. 24.60 × 8 =
  25. 25.74 × 4 =
  26. 26.25 × 4 =
  27. 27.156 × 4 =
  28. 28.51 × 8 =
  29. 29.42 × 8 =
  30. 30.93 × 4 =
  31. 31.48 × 8 =
  32. 32.23 × 8 =
  33. 33.26 × 8 =
  34. 34.54 × 4 =
  35. 35.79 × 4 =
  36. 36.30 × 8 =
  37. 37.82 × 4 =
  38. 38.16 × 8 =
  39. 39.134 × 4 =
  40. 40.48 × 8 =

Answer key

  1. 120
  2. 360
  3. 312
  4. 616
  5. 108
  6. 360
  7. 104
  8. 336
  9. 340
  10. 64
  11. 368
  12. 496
  13. 316
  14. 176
  15. 576
  16. 152
  17. 376
  18. 628
  19. 560
  20. 348
  21. 148
  22. 504
  23. 196
  24. 480
  25. 296
  26. 100
  27. 624
  28. 408
  29. 336
  30. 372
  31. 384
  32. 184
  33. 208
  34. 216
  35. 316
  36. 240
  37. 328
  38. 128
  39. 536
  40. 384

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