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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 228 · 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. 1.147 × 4 =
  2. 2.62 × 8 =
  3. 3.42 × 4 =
  4. 4.36 × 4 =
  5. 5.62 × 8 =
  6. 6.92 × 4 =
  7. 7.63 × 8 =
  8. 8.116 × 4 =
  9. 9.137 × 4 =
  10. 10.41 × 4 =
  11. 11.60 × 8 =
  12. 12.12 × 8 =
  13. 13.56 × 8 =
  14. 14.84 × 4 =
  15. 15.73 × 4 =
  16. 16.128 × 4 =
  17. 17.58 × 4 =
  18. 18.27 × 8 =
  19. 19.61 × 4 =
  20. 20.43 × 4 =
  21. 21.75 × 8 =
  22. 22.79 × 4 =
  23. 23.70 × 4 =
  24. 24.67 × 4 =
  25. 25.17 × 4 =
  26. 26.46 × 4 =
  27. 27.110 × 4 =
  28. 28.77 × 4 =
  29. 29.33 × 8 =
  30. 30.39 × 8 =
  31. 31.138 × 4 =
  32. 32.115 × 4 =
  33. 33.86 × 4 =
  34. 34.16 × 8 =
  35. 35.24 × 4 =
  36. 36.75 × 8 =
  37. 37.105 × 4 =
  38. 38.124 × 4 =
  39. 39.66 × 8 =
  40. 40.72 × 8 =

Answer key

  1. 588
  2. 496
  3. 168
  4. 144
  5. 496
  6. 368
  7. 504
  8. 464
  9. 548
  10. 164
  11. 480
  12. 96
  13. 448
  14. 336
  15. 292
  16. 512
  17. 232
  18. 216
  19. 244
  20. 172
  21. 600
  22. 316
  23. 280
  24. 268
  25. 68
  26. 184
  27. 440
  28. 308
  29. 264
  30. 312
  31. 552
  32. 460
  33. 344
  34. 128
  35. 96
  36. 600
  37. 420
  38. 496
  39. 528
  40. 576

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