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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 726 · 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. 1.18 × 8 =
  2. 2.54 × 4 =
  3. 3.116 × 4 =
  4. 4.13 × 8 =
  5. 5.39 × 4 =
  6. 6.59 × 8 =
  7. 7.43 × 8 =
  8. 8.69 × 8 =
  9. 9.31 × 4 =
  10. 10.65 × 8 =
  11. 11.16 × 4 =
  12. 12.19 × 4 =
  13. 13.74 × 8 =
  14. 14.55 × 4 =
  15. 15.12 × 8 =
  16. 16.155 × 4 =
  17. 17.59 × 8 =
  18. 18.49 × 4 =
  19. 19.75 × 8 =
  20. 20.23 × 4 =
  21. 21.150 × 4 =
  22. 22.21 × 4 =
  23. 23.138 × 4 =
  24. 24.114 × 4 =
  25. 25.16 × 8 =
  26. 26.81 × 4 =
  27. 27.21 × 8 =
  28. 28.67 × 8 =
  29. 29.42 × 8 =
  30. 30.76 × 4 =
  31. 31.23 × 8 =
  32. 32.66 × 4 =
  33. 33.23 × 4 =
  34. 34.43 × 8 =
  35. 35.75 × 8 =
  36. 36.77 × 4 =
  37. 37.35 × 8 =
  38. 38.27 × 8 =
  39. 39.20 × 4 =
  40. 40.50 × 8 =

Answer key

  1. 144
  2. 216
  3. 464
  4. 104
  5. 156
  6. 472
  7. 344
  8. 552
  9. 124
  10. 520
  11. 64
  12. 76
  13. 592
  14. 220
  15. 96
  16. 620
  17. 472
  18. 196
  19. 600
  20. 92
  21. 600
  22. 84
  23. 552
  24. 456
  25. 128
  26. 324
  27. 168
  28. 536
  29. 336
  30. 304
  31. 184
  32. 264
  33. 92
  34. 344
  35. 600
  36. 308
  37. 280
  38. 216
  39. 80
  40. 400

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