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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 294 · 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. 1.43 × 8 =
  2. 2.27 × 8 =
  3. 3.16 × 4 =
  4. 4.148 × 4 =
  5. 5.23 × 4 =
  6. 6.25 × 8 =
  7. 7.67 × 8 =
  8. 8.132 × 4 =
  9. 9.119 × 4 =
  10. 10.18 × 8 =
  11. 11.22 × 8 =
  12. 12.30 × 4 =
  13. 13.14 × 8 =
  14. 14.105 × 4 =
  15. 15.144 × 4 =
  16. 16.42 × 8 =
  17. 17.150 × 4 =
  18. 18.20 × 4 =
  19. 19.157 × 4 =
  20. 20.27 × 8 =
  21. 21.15 × 8 =
  22. 22.20 × 8 =
  23. 23.48 × 8 =
  24. 24.42 × 8 =
  25. 25.99 × 4 =
  26. 26.67 × 8 =
  27. 27.15 × 8 =
  28. 28.62 × 4 =
  29. 29.58 × 8 =
  30. 30.22 × 8 =
  31. 31.48 × 4 =
  32. 32.134 × 4 =
  33. 33.124 × 4 =
  34. 34.25 × 8 =
  35. 35.13 × 8 =
  36. 36.64 × 8 =
  37. 37.136 × 4 =
  38. 38.26 × 8 =
  39. 39.53 × 4 =
  40. 40.61 × 4 =

Answer key

  1. 344
  2. 216
  3. 64
  4. 592
  5. 92
  6. 200
  7. 536
  8. 528
  9. 476
  10. 144
  11. 176
  12. 120
  13. 112
  14. 420
  15. 576
  16. 336
  17. 600
  18. 80
  19. 628
  20. 216
  21. 120
  22. 160
  23. 384
  24. 336
  25. 396
  26. 536
  27. 120
  28. 248
  29. 464
  30. 176
  31. 192
  32. 536
  33. 496
  34. 200
  35. 104
  36. 512
  37. 544
  38. 208
  39. 212
  40. 244

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