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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 179 · 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. 1.138 × 4 =
  2. 2.146 × 4 =
  3. 3.128 × 4 =
  4. 4.55 × 4 =
  5. 5.109 × 4 =
  6. 6.114 × 4 =
  7. 7.43 × 8 =
  8. 8.153 × 4 =
  9. 9.57 × 8 =
  10. 10.116 × 4 =
  11. 11.60 × 8 =
  12. 12.13 × 8 =
  13. 13.47 × 8 =
  14. 14.123 × 4 =
  15. 15.116 × 4 =
  16. 16.24 × 4 =
  17. 17.65 × 8 =
  18. 18.26 × 4 =
  19. 19.72 × 8 =
  20. 20.35 × 8 =
  21. 21.42 × 8 =
  22. 22.53 × 4 =
  23. 23.61 × 4 =
  24. 24.35 × 4 =
  25. 25.63 × 4 =
  26. 26.117 × 4 =
  27. 27.96 × 4 =
  28. 28.37 × 8 =
  29. 29.39 × 8 =
  30. 30.26 × 8 =
  31. 31.99 × 4 =
  32. 32.48 × 8 =
  33. 33.18 × 4 =
  34. 34.28 × 8 =
  35. 35.86 × 4 =
  36. 36.112 × 4 =
  37. 37.76 × 4 =
  38. 38.85 × 4 =
  39. 39.63 × 8 =
  40. 40.71 × 8 =

Answer key

  1. 552
  2. 584
  3. 512
  4. 220
  5. 436
  6. 456
  7. 344
  8. 612
  9. 456
  10. 464
  11. 480
  12. 104
  13. 376
  14. 492
  15. 464
  16. 96
  17. 520
  18. 104
  19. 576
  20. 280
  21. 336
  22. 212
  23. 244
  24. 140
  25. 252
  26. 468
  27. 384
  28. 296
  29. 312
  30. 208
  31. 396
  32. 384
  33. 72
  34. 224
  35. 344
  36. 448
  37. 304
  38. 340
  39. 504
  40. 568

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