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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 696 · 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. 1.19 × 8 =
  2. 2.129 × 4 =
  3. 3.157 × 4 =
  4. 4.51 × 4 =
  5. 5.108 × 4 =
  6. 6.14 × 8 =
  7. 7.19 × 4 =
  8. 8.66 × 4 =
  9. 9.52 × 8 =
  10. 10.99 × 4 =
  11. 11.115 × 4 =
  12. 12.31 × 8 =
  13. 13.14 × 8 =
  14. 14.18 × 8 =
  15. 15.26 × 8 =
  16. 16.70 × 8 =
  17. 17.36 × 8 =
  18. 18.30 × 4 =
  19. 19.18 × 4 =
  20. 20.27 × 8 =
  21. 21.114 × 4 =
  22. 22.27 × 8 =
  23. 23.24 × 4 =
  24. 24.144 × 4 =
  25. 25.78 × 4 =
  26. 26.38 × 8 =
  27. 27.142 × 4 =
  28. 28.16 × 8 =
  29. 29.32 × 4 =
  30. 30.58 × 4 =
  31. 31.43 × 4 =
  32. 32.120 × 4 =
  33. 33.54 × 8 =
  34. 34.109 × 4 =
  35. 35.135 × 4 =
  36. 36.22 × 8 =
  37. 37.64 × 4 =
  38. 38.152 × 4 =
  39. 39.36 × 8 =
  40. 40.134 × 4 =

Answer key

  1. 152
  2. 516
  3. 628
  4. 204
  5. 432
  6. 112
  7. 76
  8. 264
  9. 416
  10. 396
  11. 460
  12. 248
  13. 112
  14. 144
  15. 208
  16. 560
  17. 288
  18. 120
  19. 72
  20. 216
  21. 456
  22. 216
  23. 96
  24. 576
  25. 312
  26. 304
  27. 568
  28. 128
  29. 128
  30. 232
  31. 172
  32. 480
  33. 432
  34. 436
  35. 540
  36. 176
  37. 256
  38. 608
  39. 288
  40. 536

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