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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 754 · 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. 2.147 × 4 =
  3. 3.127 × 4 =
  4. 4.102 × 4 =
  5. 5.19 × 4 =
  6. 6.42 × 8 =
  7. 7.43 × 4 =
  8. 8.38 × 8 =
  9. 9.31 × 8 =
  10. 10.158 × 4 =
  11. 11.33 × 8 =
  12. 12.32 × 8 =
  13. 13.64 × 4 =
  14. 14.48 × 8 =
  15. 15.40 × 4 =
  16. 16.17 × 8 =
  17. 17.114 × 4 =
  18. 18.63 × 8 =
  19. 19.57 × 8 =
  20. 20.63 × 8 =
  21. 21.47 × 4 =
  22. 22.25 × 8 =
  23. 23.133 × 4 =
  24. 24.53 × 4 =
  25. 25.72 × 8 =
  26. 26.12 × 8 =
  27. 27.45 × 4 =
  28. 28.13 × 8 =
  29. 29.33 × 4 =
  30. 30.109 × 4 =
  31. 31.73 × 8 =
  32. 32.39 × 4 =
  33. 33.40 × 8 =
  34. 34.104 × 4 =
  35. 35.18 × 4 =
  36. 36.62 × 8 =
  37. 37.52 × 8 =
  38. 38.134 × 4 =
  39. 39.53 × 8 =
  40. 40.154 × 4 =

Answer key

  1. 552
  2. 588
  3. 508
  4. 408
  5. 76
  6. 336
  7. 172
  8. 304
  9. 248
  10. 632
  11. 264
  12. 256
  13. 256
  14. 384
  15. 160
  16. 136
  17. 456
  18. 504
  19. 456
  20. 504
  21. 188
  22. 200
  23. 532
  24. 212
  25. 576
  26. 96
  27. 180
  28. 104
  29. 132
  30. 436
  31. 584
  32. 156
  33. 320
  34. 416
  35. 72
  36. 496
  37. 416
  38. 536
  39. 424
  40. 616

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