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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 188 · 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. 1.92 × 4 =
  2. 2.25 × 8 =
  3. 3.68 × 8 =
  4. 4.24 × 4 =
  5. 5.24 × 8 =
  6. 6.37 × 8 =
  7. 7.32 × 8 =
  8. 8.38 × 8 =
  9. 9.47 × 4 =
  10. 10.45 × 8 =
  11. 11.111 × 4 =
  12. 12.126 × 4 =
  13. 13.49 × 8 =
  14. 14.83 × 4 =
  15. 15.25 × 8 =
  16. 16.34 × 8 =
  17. 17.72 × 4 =
  18. 18.24 × 8 =
  19. 19.33 × 8 =
  20. 20.16 × 8 =
  21. 21.29 × 8 =
  22. 22.29 × 8 =
  23. 23.82 × 4 =
  24. 24.13 × 8 =
  25. 25.73 × 8 =
  26. 26.96 × 4 =
  27. 27.35 × 8 =
  28. 28.42 × 4 =
  29. 29.17 × 8 =
  30. 30.75 × 8 =
  31. 31.94 × 4 =
  32. 32.154 × 4 =
  33. 33.134 × 4 =
  34. 34.120 × 4 =
  35. 35.64 × 8 =
  36. 36.48 × 8 =
  37. 37.31 × 8 =
  38. 38.79 × 4 =
  39. 39.29 × 4 =
  40. 40.48 × 8 =

Answer key

  1. 368
  2. 200
  3. 544
  4. 96
  5. 192
  6. 296
  7. 256
  8. 304
  9. 188
  10. 360
  11. 444
  12. 504
  13. 392
  14. 332
  15. 200
  16. 272
  17. 288
  18. 192
  19. 264
  20. 128
  21. 232
  22. 232
  23. 328
  24. 104
  25. 584
  26. 384
  27. 280
  28. 168
  29. 136
  30. 600
  31. 376
  32. 616
  33. 536
  34. 480
  35. 512
  36. 384
  37. 248
  38. 316
  39. 116
  40. 384

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