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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 703 · 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. 1.59 × 8 =
  2. 2.31 × 4 =
  3. 3.119 × 4 =
  4. 4.48 × 8 =
  5. 5.57 × 8 =
  6. 6.17 × 4 =
  7. 7.41 × 8 =
  8. 8.16 × 8 =
  9. 9.20 × 8 =
  10. 10.104 × 4 =
  11. 11.37 × 8 =
  12. 12.26 × 4 =
  13. 13.50 × 8 =
  14. 14.27 × 8 =
  15. 15.72 × 4 =
  16. 16.25 × 8 =
  17. 17.31 × 8 =
  18. 18.72 × 4 =
  19. 19.59 × 8 =
  20. 20.86 × 4 =
  21. 21.38 × 8 =
  22. 22.18 × 4 =
  23. 23.74 × 8 =
  24. 24.42 × 4 =
  25. 25.34 × 8 =
  26. 26.84 × 4 =
  27. 27.65 × 8 =
  28. 28.105 × 4 =
  29. 29.41 × 4 =
  30. 30.137 × 4 =
  31. 31.153 × 4 =
  32. 32.75 × 4 =
  33. 33.133 × 4 =
  34. 34.28 × 4 =
  35. 35.39 × 4 =
  36. 36.92 × 4 =
  37. 37.57 × 8 =
  38. 38.71 × 8 =
  39. 39.38 × 4 =
  40. 40.98 × 4 =

Answer key

  1. 472
  2. 124
  3. 476
  4. 384
  5. 456
  6. 68
  7. 328
  8. 128
  9. 160
  10. 416
  11. 296
  12. 104
  13. 400
  14. 216
  15. 288
  16. 200
  17. 248
  18. 288
  19. 472
  20. 344
  21. 304
  22. 72
  23. 592
  24. 168
  25. 272
  26. 336
  27. 520
  28. 420
  29. 164
  30. 548
  31. 612
  32. 300
  33. 532
  34. 112
  35. 156
  36. 368
  37. 456
  38. 568
  39. 152
  40. 392

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