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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 665 · 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. 1.60 × 8 =
  2. 2.95 × 4 =
  3. 3.30 × 8 =
  4. 4.57 × 4 =
  5. 5.15 × 8 =
  6. 6.56 × 8 =
  7. 7.41 × 8 =
  8. 8.25 × 4 =
  9. 9.18 × 8 =
  10. 10.134 × 4 =
  11. 11.29 × 8 =
  12. 12.27 × 4 =
  13. 13.66 × 8 =
  14. 14.112 × 4 =
  15. 15.119 × 4 =
  16. 16.50 × 8 =
  17. 17.62 × 4 =
  18. 18.38 × 4 =
  19. 19.53 × 8 =
  20. 20.67 × 8 =
  21. 21.128 × 4 =
  22. 22.91 × 4 =
  23. 23.41 × 4 =
  24. 24.122 × 4 =
  25. 25.25 × 8 =
  26. 26.123 × 4 =
  27. 27.33 × 8 =
  28. 28.61 × 8 =
  29. 29.143 × 4 =
  30. 30.30 × 4 =
  31. 31.56 × 8 =
  32. 32.38 × 8 =
  33. 33.26 × 4 =
  34. 34.46 × 4 =
  35. 35.151 × 4 =
  36. 36.39 × 4 =
  37. 37.87 × 4 =
  38. 38.53 × 4 =
  39. 39.20 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 480
  2. 380
  3. 240
  4. 228
  5. 120
  6. 448
  7. 328
  8. 100
  9. 144
  10. 536
  11. 232
  12. 108
  13. 528
  14. 448
  15. 476
  16. 400
  17. 248
  18. 152
  19. 424
  20. 536
  21. 512
  22. 364
  23. 164
  24. 488
  25. 200
  26. 492
  27. 264
  28. 488
  29. 572
  30. 120
  31. 448
  32. 304
  33. 104
  34. 184
  35. 604
  36. 156
  37. 348
  38. 212
  39. 80
  40. 188

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