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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 68 · 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. 1.30 × 8 =
  2. 2.52 × 4 =
  3. 3.119 × 4 =
  4. 4.37 × 8 =
  5. 5.108 × 4 =
  6. 6.15 × 8 =
  7. 7.102 × 4 =
  8. 8.27 × 8 =
  9. 9.129 × 4 =
  10. 10.25 × 8 =
  11. 11.63 × 8 =
  12. 12.68 × 8 =
  13. 13.18 × 8 =
  14. 14.39 × 4 =
  15. 15.78 × 4 =
  16. 16.43 × 4 =
  17. 17.117 × 4 =
  18. 18.90 × 4 =
  19. 19.44 × 8 =
  20. 20.42 × 4 =
  21. 21.154 × 4 =
  22. 22.71 × 8 =
  23. 23.30 × 8 =
  24. 24.104 × 4 =
  25. 25.60 × 8 =
  26. 26.43 × 8 =
  27. 27.47 × 4 =
  28. 28.159 × 4 =
  29. 29.27 × 4 =
  30. 30.40 × 4 =
  31. 31.68 × 8 =
  32. 32.40 × 8 =
  33. 33.12 × 8 =
  34. 34.70 × 4 =
  35. 35.54 × 8 =
  36. 36.12 × 8 =
  37. 37.54 × 4 =
  38. 38.28 × 8 =
  39. 39.94 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 240
  2. 208
  3. 476
  4. 296
  5. 432
  6. 120
  7. 408
  8. 216
  9. 516
  10. 200
  11. 504
  12. 544
  13. 144
  14. 156
  15. 312
  16. 172
  17. 468
  18. 360
  19. 352
  20. 168
  21. 616
  22. 568
  23. 240
  24. 416
  25. 480
  26. 344
  27. 188
  28. 636
  29. 108
  30. 160
  31. 544
  32. 320
  33. 96
  34. 280
  35. 432
  36. 96
  37. 216
  38. 224
  39. 376
  40. 168

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