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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 513 · 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. 1.33 × 4 =
  2. 2.66 × 8 =
  3. 3.25 × 8 =
  4. 4.130 × 4 =
  5. 5.23 × 8 =
  6. 6.38 × 4 =
  7. 7.62 × 8 =
  8. 8.25 × 8 =
  9. 9.110 × 4 =
  10. 10.134 × 4 =
  11. 11.33 × 4 =
  12. 12.73 × 8 =
  13. 13.68 × 8 =
  14. 14.22 × 4 =
  15. 15.57 × 8 =
  16. 16.13 × 8 =
  17. 17.14 × 4 =
  18. 18.55 × 8 =
  19. 19.157 × 4 =
  20. 20.58 × 8 =
  21. 21.41 × 8 =
  22. 22.48 × 4 =
  23. 23.54 × 8 =
  24. 24.119 × 4 =
  25. 25.19 × 8 =
  26. 26.146 × 4 =
  27. 27.127 × 4 =
  28. 28.70 × 8 =
  29. 29.23 × 8 =
  30. 30.126 × 4 =
  31. 31.73 × 8 =
  32. 32.24 × 8 =
  33. 33.65 × 8 =
  34. 34.24 × 4 =
  35. 35.19 × 8 =
  36. 36.70 × 8 =
  37. 37.128 × 4 =
  38. 38.99 × 4 =
  39. 39.30 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 132
  2. 528
  3. 200
  4. 520
  5. 184
  6. 152
  7. 496
  8. 200
  9. 440
  10. 536
  11. 132
  12. 584
  13. 544
  14. 88
  15. 456
  16. 104
  17. 56
  18. 440
  19. 628
  20. 464
  21. 328
  22. 192
  23. 432
  24. 476
  25. 152
  26. 584
  27. 508
  28. 560
  29. 184
  30. 504
  31. 584
  32. 192
  33. 520
  34. 96
  35. 152
  36. 560
  37. 512
  38. 396
  39. 120
  40. 220

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