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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 10 · 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. 1.56 × 8 =
  2. 2.24 × 4 =
  3. 3.49 × 8 =
  4. 4.15 × 4 =
  5. 5.75 × 4 =
  6. 6.33 × 4 =
  7. 7.20 × 8 =
  8. 8.160 × 4 =
  9. 9.95 × 4 =
  10. 10.41 × 8 =
  11. 11.38 × 8 =
  12. 12.75 × 4 =
  13. 13.157 × 4 =
  14. 14.97 × 4 =
  15. 15.153 × 4 =
  16. 16.152 × 4 =
  17. 17.23 × 8 =
  18. 18.27 × 8 =
  19. 19.72 × 8 =
  20. 20.49 × 4 =
  21. 21.44 × 8 =
  22. 22.62 × 4 =
  23. 23.44 × 4 =
  24. 24.112 × 4 =
  25. 25.53 × 8 =
  26. 26.36 × 4 =
  27. 27.35 × 8 =
  28. 28.20 × 4 =
  29. 29.66 × 8 =
  30. 30.13 × 4 =
  31. 31.59 × 8 =
  32. 32.130 × 4 =
  33. 33.93 × 4 =
  34. 34.25 × 4 =
  35. 35.37 × 8 =
  36. 36.37 × 8 =
  37. 37.26 × 8 =
  38. 38.84 × 4 =
  39. 39.31 × 8 =
  40. 40.31 × 8 =

Answer key

  1. 448
  2. 96
  3. 392
  4. 60
  5. 300
  6. 132
  7. 160
  8. 640
  9. 380
  10. 328
  11. 304
  12. 300
  13. 628
  14. 388
  15. 612
  16. 608
  17. 184
  18. 216
  19. 576
  20. 196
  21. 352
  22. 248
  23. 176
  24. 448
  25. 424
  26. 144
  27. 280
  28. 80
  29. 528
  30. 52
  31. 472
  32. 520
  33. 372
  34. 100
  35. 296
  36. 296
  37. 208
  38. 336
  39. 248
  40. 248

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