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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 403 · 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. 1.27 × 8 =
  2. 2.44 × 8 =
  3. 3.15 × 8 =
  4. 4.39 × 8 =
  5. 5.33 × 4 =
  6. 6.18 × 4 =
  7. 7.74 × 4 =
  8. 8.91 × 4 =
  9. 9.47 × 4 =
  10. 10.62 × 8 =
  11. 11.38 × 8 =
  12. 12.109 × 4 =
  13. 13.117 × 4 =
  14. 14.52 × 4 =
  15. 15.44 × 4 =
  16. 16.23 × 8 =
  17. 17.140 × 4 =
  18. 18.116 × 4 =
  19. 19.105 × 4 =
  20. 20.115 × 4 =
  21. 21.36 × 4 =
  22. 22.14 × 8 =
  23. 23.55 × 8 =
  24. 24.62 × 8 =
  25. 25.155 × 4 =
  26. 26.77 × 4 =
  27. 27.62 × 8 =
  28. 28.64 × 8 =
  29. 29.29 × 4 =
  30. 30.65 × 8 =
  31. 31.59 × 8 =
  32. 32.24 × 8 =
  33. 33.17 × 8 =
  34. 34.93 × 4 =
  35. 35.64 × 4 =
  36. 36.14 × 4 =
  37. 37.88 × 4 =
  38. 38.88 × 4 =
  39. 39.113 × 4 =
  40. 40.48 × 4 =

Answer key

  1. 216
  2. 352
  3. 120
  4. 312
  5. 132
  6. 72
  7. 296
  8. 364
  9. 188
  10. 496
  11. 304
  12. 436
  13. 468
  14. 208
  15. 176
  16. 184
  17. 560
  18. 464
  19. 420
  20. 460
  21. 144
  22. 112
  23. 440
  24. 496
  25. 620
  26. 308
  27. 496
  28. 512
  29. 116
  30. 520
  31. 472
  32. 192
  33. 136
  34. 372
  35. 256
  36. 56
  37. 352
  38. 352
  39. 452
  40. 192

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