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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 875 · 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. 1.79 × 4 =
  2. 2.116 × 4 =
  3. 3.45 × 8 =
  4. 4.14 × 8 =
  5. 5.24 × 8 =
  6. 6.47 × 4 =
  7. 7.148 × 4 =
  8. 8.23 × 8 =
  9. 9.50 × 4 =
  10. 10.27 × 8 =
  11. 11.43 × 4 =
  12. 12.69 × 8 =
  13. 13.109 × 4 =
  14. 14.95 × 4 =
  15. 15.119 × 4 =
  16. 16.40 × 8 =
  17. 17.159 × 4 =
  18. 18.17 × 8 =
  19. 19.102 × 4 =
  20. 20.107 × 4 =
  21. 21.45 × 4 =
  22. 22.115 × 4 =
  23. 23.42 × 8 =
  24. 24.90 × 4 =
  25. 25.24 × 8 =
  26. 26.73 × 4 =
  27. 27.22 × 4 =
  28. 28.54 × 8 =
  29. 29.88 × 4 =
  30. 30.21 × 4 =
  31. 31.27 × 8 =
  32. 32.66 × 8 =
  33. 33.101 × 4 =
  34. 34.93 × 4 =
  35. 35.55 × 8 =
  36. 36.68 × 8 =
  37. 37.18 × 4 =
  38. 38.63 × 8 =
  39. 39.17 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 316
  2. 464
  3. 360
  4. 112
  5. 192
  6. 188
  7. 592
  8. 184
  9. 200
  10. 216
  11. 172
  12. 552
  13. 436
  14. 380
  15. 476
  16. 320
  17. 636
  18. 136
  19. 408
  20. 428
  21. 180
  22. 460
  23. 336
  24. 360
  25. 192
  26. 292
  27. 88
  28. 432
  29. 352
  30. 84
  31. 216
  32. 528
  33. 404
  34. 372
  35. 440
  36. 544
  37. 72
  38. 504
  39. 136
  40. 280

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