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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 350 · 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. 1.158 × 4 =
  2. 2.38 × 8 =
  3. 3.41 × 4 =
  4. 4.149 × 4 =
  5. 5.75 × 8 =
  6. 6.45 × 4 =
  7. 7.84 × 4 =
  8. 8.37 × 8 =
  9. 9.47 × 4 =
  10. 10.57 × 8 =
  11. 11.23 × 4 =
  12. 12.30 × 8 =
  13. 13.36 × 4 =
  14. 14.48 × 8 =
  15. 15.61 × 8 =
  16. 16.66 × 8 =
  17. 17.18 × 8 =
  18. 18.124 × 4 =
  19. 19.13 × 8 =
  20. 20.84 × 4 =
  21. 21.64 × 8 =
  22. 22.42 × 8 =
  23. 23.38 × 8 =
  24. 24.83 × 4 =
  25. 25.60 × 8 =
  26. 26.121 × 4 =
  27. 27.43 × 8 =
  28. 28.79 × 4 =
  29. 29.100 × 4 =
  30. 30.80 × 4 =
  31. 31.34 × 8 =
  32. 32.43 × 4 =
  33. 33.13 × 4 =
  34. 34.100 × 4 =
  35. 35.50 × 8 =
  36. 36.150 × 4 =
  37. 37.102 × 4 =
  38. 38.19 × 8 =
  39. 39.77 × 4 =
  40. 40.33 × 4 =

Answer key

  1. 632
  2. 304
  3. 164
  4. 596
  5. 600
  6. 180
  7. 336
  8. 296
  9. 188
  10. 456
  11. 92
  12. 240
  13. 144
  14. 384
  15. 488
  16. 528
  17. 144
  18. 496
  19. 104
  20. 336
  21. 512
  22. 336
  23. 304
  24. 332
  25. 480
  26. 484
  27. 344
  28. 316
  29. 400
  30. 320
  31. 272
  32. 172
  33. 52
  34. 400
  35. 400
  36. 600
  37. 408
  38. 152
  39. 308
  40. 132

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