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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 112 · 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 × 4 =
  2. 2.50 × 4 =
  3. 3.70 × 8 =
  4. 4.70 × 4 =
  5. 5.77 × 4 =
  6. 6.65 × 8 =
  7. 7.71 × 8 =
  8. 8.42 × 4 =
  9. 9.15 × 4 =
  10. 10.61 × 8 =
  11. 11.47 × 8 =
  12. 12.115 × 4 =
  13. 13.27 × 8 =
  14. 14.18 × 8 =
  15. 15.112 × 4 =
  16. 16.79 × 4 =
  17. 17.19 × 8 =
  18. 18.48 × 4 =
  19. 19.48 × 8 =
  20. 20.41 × 4 =
  21. 21.62 × 8 =
  22. 22.95 × 4 =
  23. 23.53 × 4 =
  24. 24.33 × 4 =
  25. 25.42 × 8 =
  26. 26.64 × 8 =
  27. 27.18 × 4 =
  28. 28.50 × 8 =
  29. 29.78 × 4 =
  30. 30.35 × 8 =
  31. 31.53 × 8 =
  32. 32.14 × 8 =
  33. 33.116 × 4 =
  34. 34.37 × 8 =
  35. 35.51 × 8 =
  36. 36.69 × 8 =
  37. 37.95 × 4 =
  38. 38.39 × 4 =
  39. 39.144 × 4 =
  40. 40.114 × 4 =

Answer key

  1. 252
  2. 200
  3. 560
  4. 280
  5. 308
  6. 520
  7. 568
  8. 168
  9. 60
  10. 488
  11. 376
  12. 460
  13. 216
  14. 144
  15. 448
  16. 316
  17. 152
  18. 192
  19. 384
  20. 164
  21. 496
  22. 380
  23. 212
  24. 132
  25. 336
  26. 512
  27. 72
  28. 400
  29. 312
  30. 280
  31. 424
  32. 112
  33. 464
  34. 296
  35. 408
  36. 552
  37. 380
  38. 156
  39. 576
  40. 456

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