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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 57 · 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. 1.126 × 4 =
  2. 2.50 × 4 =
  3. 3.61 × 8 =
  4. 4.99 × 4 =
  5. 5.23 × 8 =
  6. 6.116 × 4 =
  7. 7.85 × 4 =
  8. 8.63 × 8 =
  9. 9.45 × 8 =
  10. 10.74 × 8 =
  11. 11.16 × 8 =
  12. 12.34 × 8 =
  13. 13.121 × 4 =
  14. 14.19 × 4 =
  15. 15.69 × 8 =
  16. 16.151 × 4 =
  17. 17.30 × 8 =
  18. 18.107 × 4 =
  19. 19.67 × 8 =
  20. 20.84 × 4 =
  21. 21.52 × 8 =
  22. 22.38 × 8 =
  23. 23.72 × 4 =
  24. 24.107 × 4 =
  25. 25.21 × 4 =
  26. 26.13 × 8 =
  27. 27.72 × 8 =
  28. 28.94 × 4 =
  29. 29.31 × 8 =
  30. 30.22 × 4 =
  31. 31.21 × 4 =
  32. 32.26 × 8 =
  33. 33.12 × 8 =
  34. 34.42 × 8 =
  35. 35.28 × 8 =
  36. 36.33 × 8 =
  37. 37.33 × 8 =
  38. 38.68 × 8 =
  39. 39.108 × 4 =
  40. 40.57 × 8 =

Answer key

  1. 504
  2. 200
  3. 488
  4. 396
  5. 184
  6. 464
  7. 340
  8. 504
  9. 360
  10. 592
  11. 128
  12. 272
  13. 484
  14. 76
  15. 552
  16. 604
  17. 240
  18. 428
  19. 536
  20. 336
  21. 416
  22. 304
  23. 288
  24. 428
  25. 84
  26. 104
  27. 576
  28. 376
  29. 248
  30. 88
  31. 84
  32. 208
  33. 96
  34. 336
  35. 224
  36. 264
  37. 264
  38. 544
  39. 432
  40. 456

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