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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 811 · 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. 1.114 × 4 =
  2. 2.25 × 8 =
  3. 3.17 × 8 =
  4. 4.36 × 8 =
  5. 5.81 × 4 =
  6. 6.57 × 8 =
  7. 7.40 × 8 =
  8. 8.138 × 4 =
  9. 9.12 × 8 =
  10. 10.46 × 8 =
  11. 11.81 × 4 =
  12. 12.38 × 8 =
  13. 13.72 × 8 =
  14. 14.67 × 8 =
  15. 15.37 × 8 =
  16. 16.41 × 8 =
  17. 17.91 × 4 =
  18. 18.58 × 8 =
  19. 19.42 × 8 =
  20. 20.43 × 8 =
  21. 21.75 × 4 =
  22. 22.48 × 4 =
  23. 23.55 × 8 =
  24. 24.53 × 4 =
  25. 25.14 × 8 =
  26. 26.138 × 4 =
  27. 27.62 × 8 =
  28. 28.21 × 8 =
  29. 29.62 × 4 =
  30. 30.43 × 8 =
  31. 31.48 × 8 =
  32. 32.108 × 4 =
  33. 33.12 × 8 =
  34. 34.13 × 4 =
  35. 35.27 × 8 =
  36. 36.18 × 4 =
  37. 37.55 × 4 =
  38. 38.93 × 4 =
  39. 39.22 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 456
  2. 200
  3. 136
  4. 288
  5. 324
  6. 456
  7. 320
  8. 552
  9. 96
  10. 368
  11. 324
  12. 304
  13. 576
  14. 536
  15. 296
  16. 328
  17. 364
  18. 464
  19. 336
  20. 344
  21. 300
  22. 192
  23. 440
  24. 212
  25. 112
  26. 552
  27. 496
  28. 168
  29. 248
  30. 344
  31. 384
  32. 432
  33. 96
  34. 52
  35. 216
  36. 72
  37. 220
  38. 372
  39. 176
  40. 288

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