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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 555 · 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. 1.58 × 8 =
  2. 2.31 × 4 =
  3. 3.29 × 8 =
  4. 4.47 × 8 =
  5. 5.29 × 8 =
  6. 6.36 × 8 =
  7. 7.20 × 4 =
  8. 8.15 × 8 =
  9. 9.40 × 8 =
  10. 10.25 × 8 =
  11. 11.22 × 8 =
  12. 12.41 × 8 =
  13. 13.122 × 4 =
  14. 14.112 × 4 =
  15. 15.47 × 8 =
  16. 16.38 × 8 =
  17. 17.59 × 8 =
  18. 18.21 × 4 =
  19. 19.77 × 4 =
  20. 20.74 × 8 =
  21. 21.25 × 4 =
  22. 22.66 × 4 =
  23. 23.17 × 4 =
  24. 24.120 × 4 =
  25. 25.66 × 8 =
  26. 26.63 × 4 =
  27. 27.54 × 4 =
  28. 28.151 × 4 =
  29. 29.66 × 8 =
  30. 30.116 × 4 =
  31. 31.24 × 8 =
  32. 32.24 × 4 =
  33. 33.113 × 4 =
  34. 34.31 × 4 =
  35. 35.71 × 4 =
  36. 36.18 × 8 =
  37. 37.20 × 8 =
  38. 38.19 × 4 =
  39. 39.52 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 464
  2. 124
  3. 232
  4. 376
  5. 232
  6. 288
  7. 80
  8. 120
  9. 320
  10. 200
  11. 176
  12. 328
  13. 488
  14. 448
  15. 376
  16. 304
  17. 472
  18. 84
  19. 308
  20. 592
  21. 100
  22. 264
  23. 68
  24. 480
  25. 528
  26. 252
  27. 216
  28. 604
  29. 528
  30. 464
  31. 192
  32. 96
  33. 452
  34. 124
  35. 284
  36. 144
  37. 160
  38. 76
  39. 416
  40. 96

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