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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 265 · 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. 1.149 × 4 =
  2. 2.19 × 4 =
  3. 3.42 × 4 =
  4. 4.108 × 4 =
  5. 5.29 × 8 =
  6. 6.75 × 4 =
  7. 7.44 × 4 =
  8. 8.66 × 4 =
  9. 9.79 × 4 =
  10. 10.54 × 8 =
  11. 11.115 × 4 =
  12. 12.16 × 8 =
  13. 13.77 × 4 =
  14. 14.49 × 8 =
  15. 15.39 × 8 =
  16. 16.56 × 4 =
  17. 17.35 × 8 =
  18. 18.12 × 8 =
  19. 19.85 × 4 =
  20. 20.113 × 4 =
  21. 21.155 × 4 =
  22. 22.64 × 4 =
  23. 23.65 × 8 =
  24. 24.44 × 8 =
  25. 25.38 × 8 =
  26. 26.92 × 4 =
  27. 27.147 × 4 =
  28. 28.45 × 8 =
  29. 29.14 × 8 =
  30. 30.17 × 4 =
  31. 31.47 × 8 =
  32. 32.20 × 8 =
  33. 33.154 × 4 =
  34. 34.15 × 4 =
  35. 35.63 × 4 =
  36. 36.46 × 8 =
  37. 37.113 × 4 =
  38. 38.15 × 8 =
  39. 39.119 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 596
  2. 76
  3. 168
  4. 432
  5. 232
  6. 300
  7. 176
  8. 264
  9. 316
  10. 432
  11. 460
  12. 128
  13. 308
  14. 392
  15. 312
  16. 224
  17. 280
  18. 96
  19. 340
  20. 452
  21. 620
  22. 256
  23. 520
  24. 352
  25. 304
  26. 368
  27. 588
  28. 360
  29. 112
  30. 68
  31. 376
  32. 160
  33. 616
  34. 60
  35. 252
  36. 368
  37. 452
  38. 120
  39. 476
  40. 208

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