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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 768 · 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. 2.113 × 4 =
  3. 3.136 × 4 =
  4. 4.21 × 4 =
  5. 5.144 × 4 =
  6. 6.71 × 8 =
  7. 7.93 × 4 =
  8. 8.43 × 4 =
  9. 9.37 × 8 =
  10. 10.60 × 4 =
  11. 11.110 × 4 =
  12. 12.45 × 8 =
  13. 13.62 × 8 =
  14. 14.144 × 4 =
  15. 15.48 × 4 =
  16. 16.70 × 8 =
  17. 17.157 × 4 =
  18. 18.77 × 4 =
  19. 19.17 × 8 =
  20. 20.125 × 4 =
  21. 21.62 × 8 =
  22. 22.56 × 8 =
  23. 23.54 × 8 =
  24. 24.43 × 8 =
  25. 25.15 × 8 =
  26. 26.48 × 4 =
  27. 27.64 × 4 =
  28. 28.69 × 8 =
  29. 29.39 × 4 =
  30. 30.48 × 8 =
  31. 31.125 × 4 =
  32. 32.29 × 8 =
  33. 33.31 × 8 =
  34. 34.77 × 4 =
  35. 35.17 × 8 =
  36. 36.138 × 4 =
  37. 37.59 × 4 =
  38. 38.64 × 8 =
  39. 39.13 × 8 =
  40. 40.58 × 4 =

Answer key

  1. 476
  2. 452
  3. 544
  4. 84
  5. 576
  6. 568
  7. 372
  8. 172
  9. 296
  10. 240
  11. 440
  12. 360
  13. 496
  14. 576
  15. 192
  16. 560
  17. 628
  18. 308
  19. 136
  20. 500
  21. 496
  22. 448
  23. 432
  24. 344
  25. 120
  26. 192
  27. 256
  28. 552
  29. 156
  30. 384
  31. 500
  32. 232
  33. 248
  34. 308
  35. 136
  36. 552
  37. 236
  38. 512
  39. 104
  40. 232

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