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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 122 · 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. 1.47 × 8 =
  2. 2.65 × 8 =
  3. 3.49 × 8 =
  4. 4.22 × 4 =
  5. 5.46 × 8 =
  6. 6.50 × 8 =
  7. 7.37 × 8 =
  8. 8.26 × 8 =
  9. 9.73 × 8 =
  10. 10.53 × 4 =
  11. 11.13 × 8 =
  12. 12.55 × 8 =
  13. 13.153 × 4 =
  14. 14.49 × 4 =
  15. 15.68 × 4 =
  16. 16.52 × 4 =
  17. 17.64 × 8 =
  18. 18.26 × 8 =
  19. 19.25 × 8 =
  20. 20.38 × 4 =
  21. 21.139 × 4 =
  22. 22.15 × 8 =
  23. 23.16 × 4 =
  24. 24.71 × 8 =
  25. 25.27 × 8 =
  26. 26.30 × 4 =
  27. 27.52 × 8 =
  28. 28.62 × 8 =
  29. 29.53 × 8 =
  30. 30.18 × 4 =
  31. 31.115 × 4 =
  32. 32.73 × 8 =
  33. 33.13 × 8 =
  34. 34.23 × 8 =
  35. 35.63 × 8 =
  36. 36.20 × 8 =
  37. 37.39 × 8 =
  38. 38.87 × 4 =
  39. 39.17 × 8 =
  40. 40.121 × 4 =

Answer key

  1. 376
  2. 520
  3. 392
  4. 88
  5. 368
  6. 400
  7. 296
  8. 208
  9. 584
  10. 212
  11. 104
  12. 440
  13. 612
  14. 196
  15. 272
  16. 208
  17. 512
  18. 208
  19. 200
  20. 152
  21. 556
  22. 120
  23. 64
  24. 568
  25. 216
  26. 120
  27. 416
  28. 496
  29. 424
  30. 72
  31. 460
  32. 584
  33. 104
  34. 184
  35. 504
  36. 160
  37. 312
  38. 348
  39. 136
  40. 484

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