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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 154 · 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. 1.18 × 8 =
  2. 2.104 × 4 =
  3. 3.15 × 8 =
  4. 4.17 × 4 =
  5. 5.23 × 8 =
  6. 6.26 × 8 =
  7. 7.38 × 4 =
  8. 8.42 × 8 =
  9. 9.61 × 8 =
  10. 10.55 × 8 =
  11. 11.47 × 8 =
  12. 12.16 × 4 =
  13. 13.57 × 8 =
  14. 14.82 × 4 =
  15. 15.66 × 4 =
  16. 16.43 × 8 =
  17. 17.72 × 8 =
  18. 18.123 × 4 =
  19. 19.31 × 4 =
  20. 20.73 × 4 =
  21. 21.22 × 8 =
  22. 22.39 × 8 =
  23. 23.65 × 8 =
  24. 24.68 × 4 =
  25. 25.27 × 8 =
  26. 26.138 × 4 =
  27. 27.115 × 4 =
  28. 28.45 × 8 =
  29. 29.29 × 8 =
  30. 30.71 × 8 =
  31. 31.37 × 4 =
  32. 32.105 × 4 =
  33. 33.66 × 8 =
  34. 34.51 × 8 =
  35. 35.31 × 4 =
  36. 36.65 × 8 =
  37. 37.38 × 8 =
  38. 38.26 × 8 =
  39. 39.71 × 8 =
  40. 40.131 × 4 =

Answer key

  1. 144
  2. 416
  3. 120
  4. 68
  5. 184
  6. 208
  7. 152
  8. 336
  9. 488
  10. 440
  11. 376
  12. 64
  13. 456
  14. 328
  15. 264
  16. 344
  17. 576
  18. 492
  19. 124
  20. 292
  21. 176
  22. 312
  23. 520
  24. 272
  25. 216
  26. 552
  27. 460
  28. 360
  29. 232
  30. 568
  31. 148
  32. 420
  33. 528
  34. 408
  35. 124
  36. 520
  37. 304
  38. 208
  39. 568
  40. 524

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