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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 527 · 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. 1.49 × 8 =
  2. 2.40 × 8 =
  3. 3.146 × 4 =
  4. 4.61 × 4 =
  5. 5.56 × 8 =
  6. 6.78 × 4 =
  7. 7.99 × 4 =
  8. 8.42 × 4 =
  9. 9.96 × 4 =
  10. 10.148 × 4 =
  11. 11.41 × 4 =
  12. 12.36 × 8 =
  13. 13.39 × 8 =
  14. 14.110 × 4 =
  15. 15.18 × 4 =
  16. 16.72 × 8 =
  17. 17.87 × 4 =
  18. 18.52 × 4 =
  19. 19.75 × 4 =
  20. 20.160 × 4 =
  21. 21.28 × 4 =
  22. 22.30 × 4 =
  23. 23.36 × 8 =
  24. 24.17 × 8 =
  25. 25.40 × 8 =
  26. 26.28 × 8 =
  27. 27.135 × 4 =
  28. 28.68 × 8 =
  29. 29.96 × 4 =
  30. 30.12 × 8 =
  31. 31.140 × 4 =
  32. 32.93 × 4 =
  33. 33.75 × 8 =
  34. 34.141 × 4 =
  35. 35.13 × 4 =
  36. 36.74 × 4 =
  37. 37.46 × 8 =
  38. 38.104 × 4 =
  39. 39.93 × 4 =
  40. 40.43 × 8 =

Answer key

  1. 392
  2. 320
  3. 584
  4. 244
  5. 448
  6. 312
  7. 396
  8. 168
  9. 384
  10. 592
  11. 164
  12. 288
  13. 312
  14. 440
  15. 72
  16. 576
  17. 348
  18. 208
  19. 300
  20. 640
  21. 112
  22. 120
  23. 288
  24. 136
  25. 320
  26. 224
  27. 540
  28. 544
  29. 384
  30. 96
  31. 560
  32. 372
  33. 600
  34. 564
  35. 52
  36. 296
  37. 368
  38. 416
  39. 372
  40. 344

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