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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 715 · 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. 1.34 × 4 =
  2. 2.14 × 8 =
  3. 3.41 × 8 =
  4. 4.55 × 8 =
  5. 5.58 × 8 =
  6. 6.17 × 4 =
  7. 7.44 × 8 =
  8. 8.37 × 8 =
  9. 9.42 × 8 =
  10. 10.140 × 4 =
  11. 11.61 × 4 =
  12. 12.28 × 8 =
  13. 13.39 × 8 =
  14. 14.36 × 8 =
  15. 15.134 × 4 =
  16. 16.18 × 4 =
  17. 17.26 × 8 =
  18. 18.54 × 8 =
  19. 19.93 × 4 =
  20. 20.54 × 8 =
  21. 21.50 × 8 =
  22. 22.82 × 4 =
  23. 23.58 × 4 =
  24. 24.55 × 4 =
  25. 25.134 × 4 =
  26. 26.70 × 8 =
  27. 27.71 × 4 =
  28. 28.42 × 4 =
  29. 29.37 × 4 =
  30. 30.26 × 8 =
  31. 31.128 × 4 =
  32. 32.29 × 8 =
  33. 33.46 × 8 =
  34. 34.150 × 4 =
  35. 35.21 × 8 =
  36. 36.28 × 8 =
  37. 37.27 × 8 =
  38. 38.62 × 8 =
  39. 39.79 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 136
  2. 112
  3. 328
  4. 440
  5. 464
  6. 68
  7. 352
  8. 296
  9. 336
  10. 560
  11. 244
  12. 224
  13. 312
  14. 288
  15. 536
  16. 72
  17. 208
  18. 432
  19. 372
  20. 432
  21. 400
  22. 328
  23. 232
  24. 220
  25. 536
  26. 560
  27. 284
  28. 168
  29. 148
  30. 208
  31. 512
  32. 232
  33. 368
  34. 600
  35. 168
  36. 224
  37. 216
  38. 496
  39. 316
  40. 264

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