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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 460 · 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. 1.62 × 8 =
  2. 2.127 × 4 =
  3. 3.102 × 4 =
  4. 4.71 × 8 =
  5. 5.76 × 4 =
  6. 6.112 × 4 =
  7. 7.34 × 8 =
  8. 8.33 × 4 =
  9. 9.126 × 4 =
  10. 10.94 × 4 =
  11. 11.62 × 8 =
  12. 12.90 × 4 =
  13. 13.45 × 8 =
  14. 14.144 × 4 =
  15. 15.67 × 8 =
  16. 16.101 × 4 =
  17. 17.25 × 8 =
  18. 18.86 × 4 =
  19. 19.74 × 4 =
  20. 20.65 × 8 =
  21. 21.12 × 8 =
  22. 22.64 × 8 =
  23. 23.15 × 8 =
  24. 24.51 × 4 =
  25. 25.39 × 4 =
  26. 26.137 × 4 =
  27. 27.54 × 8 =
  28. 28.35 × 8 =
  29. 29.43 × 8 =
  30. 30.20 × 8 =
  31. 31.47 × 4 =
  32. 32.55 × 8 =
  33. 33.135 × 4 =
  34. 34.14 × 4 =
  35. 35.145 × 4 =
  36. 36.63 × 4 =
  37. 37.19 × 8 =
  38. 38.27 × 8 =
  39. 39.66 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 496
  2. 508
  3. 408
  4. 568
  5. 304
  6. 448
  7. 272
  8. 132
  9. 504
  10. 376
  11. 496
  12. 360
  13. 360
  14. 576
  15. 536
  16. 404
  17. 200
  18. 344
  19. 296
  20. 520
  21. 96
  22. 512
  23. 120
  24. 204
  25. 156
  26. 548
  27. 432
  28. 280
  29. 344
  30. 160
  31. 188
  32. 440
  33. 540
  34. 56
  35. 580
  36. 252
  37. 152
  38. 216
  39. 264
  40. 68

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