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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 970 · 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. 2.74 × 8 =
  3. 3.15 × 4 =
  4. 4.57 × 8 =
  5. 5.31 × 8 =
  6. 6.93 × 4 =
  7. 7.56 × 8 =
  8. 8.149 × 4 =
  9. 9.33 × 8 =
  10. 10.16 × 4 =
  11. 11.82 × 4 =
  12. 12.123 × 4 =
  13. 13.50 × 8 =
  14. 14.69 × 4 =
  15. 15.41 × 8 =
  16. 16.45 × 8 =
  17. 17.29 × 4 =
  18. 18.30 × 8 =
  19. 19.65 × 4 =
  20. 20.123 × 4 =
  21. 21.57 × 8 =
  22. 22.20 × 8 =
  23. 23.158 × 4 =
  24. 24.30 × 4 =
  25. 25.71 × 8 =
  26. 26.66 × 4 =
  27. 27.38 × 4 =
  28. 28.78 × 4 =
  29. 29.69 × 8 =
  30. 30.147 × 4 =
  31. 31.39 × 8 =
  32. 32.56 × 8 =
  33. 33.29 × 8 =
  34. 34.14 × 4 =
  35. 35.72 × 4 =
  36. 36.25 × 4 =
  37. 37.22 × 8 =
  38. 38.36 × 8 =
  39. 39.18 × 4 =
  40. 40.44 × 8 =

Answer key

  1. 472
  2. 592
  3. 60
  4. 456
  5. 248
  6. 372
  7. 448
  8. 596
  9. 264
  10. 64
  11. 328
  12. 492
  13. 400
  14. 276
  15. 328
  16. 360
  17. 116
  18. 240
  19. 260
  20. 492
  21. 456
  22. 160
  23. 632
  24. 120
  25. 568
  26. 264
  27. 152
  28. 312
  29. 552
  30. 588
  31. 312
  32. 448
  33. 232
  34. 56
  35. 288
  36. 100
  37. 176
  38. 288
  39. 72
  40. 352

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