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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 187 · 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. 1.38 × 8 =
  2. 2.68 × 4 =
  3. 3.157 × 4 =
  4. 4.136 × 4 =
  5. 5.43 × 8 =
  6. 6.21 × 4 =
  7. 7.25 × 8 =
  8. 8.22 × 8 =
  9. 9.106 × 4 =
  10. 10.31 × 8 =
  11. 11.27 × 4 =
  12. 12.38 × 8 =
  13. 13.16 × 8 =
  14. 14.156 × 4 =
  15. 15.22 × 8 =
  16. 16.12 × 8 =
  17. 17.157 × 4 =
  18. 18.48 × 8 =
  19. 19.42 × 4 =
  20. 20.84 × 4 =
  21. 21.66 × 4 =
  22. 22.44 × 4 =
  23. 23.73 × 8 =
  24. 24.30 × 4 =
  25. 25.70 × 8 =
  26. 26.42 × 8 =
  27. 27.69 × 4 =
  28. 28.156 × 4 =
  29. 29.36 × 8 =
  30. 30.35 × 8 =
  31. 31.36 × 4 =
  32. 32.96 × 4 =
  33. 33.136 × 4 =
  34. 34.129 × 4 =
  35. 35.71 × 4 =
  36. 36.48 × 8 =
  37. 37.69 × 8 =
  38. 38.159 × 4 =
  39. 39.39 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 304
  2. 272
  3. 628
  4. 544
  5. 344
  6. 84
  7. 200
  8. 176
  9. 424
  10. 248
  11. 108
  12. 304
  13. 128
  14. 624
  15. 176
  16. 96
  17. 628
  18. 384
  19. 168
  20. 336
  21. 264
  22. 176
  23. 584
  24. 120
  25. 560
  26. 336
  27. 276
  28. 624
  29. 288
  30. 280
  31. 144
  32. 384
  33. 544
  34. 516
  35. 284
  36. 384
  37. 552
  38. 636
  39. 156
  40. 144

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