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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 385 · 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. 1.48 × 4 =
  2. 2.85 × 4 =
  3. 3.94 × 4 =
  4. 4.38 × 8 =
  5. 5.149 × 4 =
  6. 6.30 × 4 =
  7. 7.17 × 4 =
  8. 8.71 × 4 =
  9. 9.21 × 4 =
  10. 10.43 × 8 =
  11. 11.38 × 8 =
  12. 12.29 × 4 =
  13. 13.27 × 4 =
  14. 14.64 × 8 =
  15. 15.12 × 8 =
  16. 16.123 × 4 =
  17. 17.90 × 4 =
  18. 18.49 × 4 =
  19. 19.33 × 4 =
  20. 20.50 × 4 =
  21. 21.32 × 4 =
  22. 22.50 × 8 =
  23. 23.115 × 4 =
  24. 24.29 × 8 =
  25. 25.13 × 8 =
  26. 26.73 × 8 =
  27. 27.75 × 4 =
  28. 28.16 × 8 =
  29. 29.23 × 8 =
  30. 30.94 × 4 =
  31. 31.12 × 8 =
  32. 32.139 × 4 =
  33. 33.147 × 4 =
  34. 34.57 × 4 =
  35. 35.20 × 8 =
  36. 36.67 × 4 =
  37. 37.151 × 4 =
  38. 38.143 × 4 =
  39. 39.67 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 192
  2. 340
  3. 376
  4. 304
  5. 596
  6. 120
  7. 68
  8. 284
  9. 84
  10. 344
  11. 304
  12. 116
  13. 108
  14. 512
  15. 96
  16. 492
  17. 360
  18. 196
  19. 132
  20. 200
  21. 128
  22. 400
  23. 460
  24. 232
  25. 104
  26. 584
  27. 300
  28. 128
  29. 184
  30. 376
  31. 96
  32. 556
  33. 588
  34. 228
  35. 160
  36. 268
  37. 604
  38. 572
  39. 268
  40. 104

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