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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 873 · 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. 1.102 × 4 =
  2. 2.57 × 8 =
  3. 3.46 × 8 =
  4. 4.55 × 8 =
  5. 5.20 × 8 =
  6. 6.53 × 4 =
  7. 7.32 × 8 =
  8. 8.92 × 4 =
  9. 9.42 × 8 =
  10. 10.27 × 4 =
  11. 11.99 × 4 =
  12. 12.56 × 4 =
  13. 13.66 × 8 =
  14. 14.41 × 8 =
  15. 15.41 × 4 =
  16. 16.23 × 8 =
  17. 17.87 × 4 =
  18. 18.51 × 8 =
  19. 19.35 × 8 =
  20. 20.60 × 8 =
  21. 21.82 × 4 =
  22. 22.142 × 4 =
  23. 23.61 × 8 =
  24. 24.19 × 4 =
  25. 25.98 × 4 =
  26. 26.114 × 4 =
  27. 27.16 × 4 =
  28. 28.151 × 4 =
  29. 29.148 × 4 =
  30. 30.15 × 8 =
  31. 31.52 × 4 =
  32. 32.68 × 8 =
  33. 33.18 × 8 =
  34. 34.120 × 4 =
  35. 35.149 × 4 =
  36. 36.42 × 8 =
  37. 37.27 × 4 =
  38. 38.28 × 8 =
  39. 39.146 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 408
  2. 456
  3. 368
  4. 440
  5. 160
  6. 212
  7. 256
  8. 368
  9. 336
  10. 108
  11. 396
  12. 224
  13. 528
  14. 328
  15. 164
  16. 184
  17. 348
  18. 408
  19. 280
  20. 480
  21. 328
  22. 568
  23. 488
  24. 76
  25. 392
  26. 456
  27. 64
  28. 604
  29. 592
  30. 120
  31. 208
  32. 544
  33. 144
  34. 480
  35. 596
  36. 336
  37. 108
  38. 224
  39. 584
  40. 200

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