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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 719 · 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. 1.69 × 8 =
  2. 2.32 × 8 =
  3. 3.48 × 8 =
  4. 4.16 × 4 =
  5. 5.75 × 8 =
  6. 6.55 × 4 =
  7. 7.117 × 4 =
  8. 8.18 × 8 =
  9. 9.52 × 8 =
  10. 10.47 × 8 =
  11. 11.52 × 8 =
  12. 12.49 × 8 =
  13. 13.96 × 4 =
  14. 14.73 × 8 =
  15. 15.43 × 4 =
  16. 16.148 × 4 =
  17. 17.43 × 4 =
  18. 18.132 × 4 =
  19. 19.17 × 8 =
  20. 20.129 × 4 =
  21. 21.114 × 4 =
  22. 22.74 × 8 =
  23. 23.136 × 4 =
  24. 24.37 × 8 =
  25. 25.16 × 8 =
  26. 26.84 × 4 =
  27. 27.66 × 8 =
  28. 28.122 × 4 =
  29. 29.28 × 8 =
  30. 30.124 × 4 =
  31. 31.52 × 4 =
  32. 32.115 × 4 =
  33. 33.48 × 8 =
  34. 34.17 × 8 =
  35. 35.26 × 8 =
  36. 36.24 × 4 =
  37. 37.71 × 8 =
  38. 38.71 × 8 =
  39. 39.98 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 552
  2. 256
  3. 384
  4. 64
  5. 600
  6. 220
  7. 468
  8. 144
  9. 416
  10. 376
  11. 416
  12. 392
  13. 384
  14. 584
  15. 172
  16. 592
  17. 172
  18. 528
  19. 136
  20. 516
  21. 456
  22. 592
  23. 544
  24. 296
  25. 128
  26. 336
  27. 528
  28. 488
  29. 224
  30. 496
  31. 208
  32. 460
  33. 384
  34. 136
  35. 208
  36. 96
  37. 568
  38. 568
  39. 392
  40. 124

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