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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 467 · 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. 1.73 × 8 =
  2. 2.38 × 4 =
  3. 3.48 × 8 =
  4. 4.21 × 8 =
  5. 5.85 × 4 =
  6. 6.45 × 8 =
  7. 7.73 × 4 =
  8. 8.25 × 4 =
  9. 9.62 × 8 =
  10. 10.88 × 4 =
  11. 11.56 × 8 =
  12. 12.121 × 4 =
  13. 13.32 × 8 =
  14. 14.52 × 4 =
  15. 15.29 × 4 =
  16. 16.38 × 4 =
  17. 17.34 × 8 =
  18. 18.22 × 4 =
  19. 19.20 × 4 =
  20. 20.46 × 4 =
  21. 21.159 × 4 =
  22. 22.44 × 8 =
  23. 23.137 × 4 =
  24. 24.83 × 4 =
  25. 25.103 × 4 =
  26. 26.35 × 4 =
  27. 27.120 × 4 =
  28. 28.56 × 8 =
  29. 29.112 × 4 =
  30. 30.35 × 8 =
  31. 31.66 × 4 =
  32. 32.50 × 8 =
  33. 33.63 × 8 =
  34. 34.38 × 8 =
  35. 35.23 × 8 =
  36. 36.156 × 4 =
  37. 37.30 × 8 =
  38. 38.63 × 8 =
  39. 39.87 × 4 =
  40. 40.41 × 8 =

Answer key

  1. 584
  2. 152
  3. 384
  4. 168
  5. 340
  6. 360
  7. 292
  8. 100
  9. 496
  10. 352
  11. 448
  12. 484
  13. 256
  14. 208
  15. 116
  16. 152
  17. 272
  18. 88
  19. 80
  20. 184
  21. 636
  22. 352
  23. 548
  24. 332
  25. 412
  26. 140
  27. 480
  28. 448
  29. 448
  30. 280
  31. 264
  32. 400
  33. 504
  34. 304
  35. 184
  36. 624
  37. 240
  38. 504
  39. 348
  40. 328

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