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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 25 · 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. 1.119 × 4 =
  2. 2.51 × 8 =
  3. 3.26 × 8 =
  4. 4.39 × 8 =
  5. 5.36 × 8 =
  6. 6.132 × 4 =
  7. 7.95 × 4 =
  8. 8.46 × 4 =
  9. 9.49 × 4 =
  10. 10.34 × 8 =
  11. 11.17 × 4 =
  12. 12.20 × 4 =
  13. 13.65 × 8 =
  14. 14.70 × 8 =
  15. 15.83 × 4 =
  16. 16.54 × 8 =
  17. 17.32 × 4 =
  18. 18.127 × 4 =
  19. 19.66 × 8 =
  20. 20.37 × 4 =
  21. 21.22 × 8 =
  22. 22.32 × 8 =
  23. 23.124 × 4 =
  24. 24.79 × 4 =
  25. 25.13 × 8 =
  26. 26.75 × 8 =
  27. 27.75 × 4 =
  28. 28.29 × 8 =
  29. 29.31 × 8 =
  30. 30.55 × 8 =
  31. 31.112 × 4 =
  32. 32.115 × 4 =
  33. 33.64 × 8 =
  34. 34.15 × 4 =
  35. 35.45 × 8 =
  36. 36.34 × 4 =
  37. 37.19 × 8 =
  38. 38.149 × 4 =
  39. 39.49 × 8 =
  40. 40.159 × 4 =

Answer key

  1. 476
  2. 408
  3. 208
  4. 312
  5. 288
  6. 528
  7. 380
  8. 184
  9. 196
  10. 272
  11. 68
  12. 80
  13. 520
  14. 560
  15. 332
  16. 432
  17. 128
  18. 508
  19. 528
  20. 148
  21. 176
  22. 256
  23. 496
  24. 316
  25. 104
  26. 600
  27. 300
  28. 232
  29. 248
  30. 440
  31. 448
  32. 460
  33. 512
  34. 60
  35. 360
  36. 136
  37. 152
  38. 596
  39. 392
  40. 636

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