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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 31 · 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. 1.113 × 4 =
  2. 2.44 × 4 =
  3. 3.13 × 8 =
  4. 4.37 × 4 =
  5. 5.39 × 8 =
  6. 6.95 × 4 =
  7. 7.144 × 4 =
  8. 8.15 × 8 =
  9. 9.68 × 4 =
  10. 10.72 × 8 =
  11. 11.84 × 4 =
  12. 12.123 × 4 =
  13. 13.133 × 4 =
  14. 14.66 × 8 =
  15. 15.38 × 4 =
  16. 16.105 × 4 =
  17. 17.66 × 8 =
  18. 18.65 × 4 =
  19. 19.41 × 4 =
  20. 20.19 × 4 =
  21. 21.55 × 8 =
  22. 22.160 × 4 =
  23. 23.93 × 4 =
  24. 24.90 × 4 =
  25. 25.92 × 4 =
  26. 26.44 × 8 =
  27. 27.50 × 8 =
  28. 28.113 × 4 =
  29. 29.61 × 8 =
  30. 30.71 × 8 =
  31. 31.47 × 8 =
  32. 32.13 × 8 =
  33. 33.36 × 4 =
  34. 34.45 × 4 =
  35. 35.78 × 4 =
  36. 36.50 × 4 =
  37. 37.19 × 4 =
  38. 38.15 × 8 =
  39. 39.33 × 8 =
  40. 40.56 × 8 =

Answer key

  1. 452
  2. 176
  3. 104
  4. 148
  5. 312
  6. 380
  7. 576
  8. 120
  9. 272
  10. 576
  11. 336
  12. 492
  13. 532
  14. 528
  15. 152
  16. 420
  17. 528
  18. 260
  19. 164
  20. 76
  21. 440
  22. 640
  23. 372
  24. 360
  25. 368
  26. 352
  27. 400
  28. 452
  29. 488
  30. 568
  31. 376
  32. 104
  33. 144
  34. 180
  35. 312
  36. 200
  37. 76
  38. 120
  39. 264
  40. 448

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