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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 255 · 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. 1.13 × 8 =
  2. 2.54 × 8 =
  3. 3.58 × 4 =
  4. 4.60 × 8 =
  5. 5.27 × 8 =
  6. 6.28 × 4 =
  7. 7.60 × 4 =
  8. 8.66 × 8 =
  9. 9.24 × 8 =
  10. 10.33 × 4 =
  11. 11.115 × 4 =
  12. 12.157 × 4 =
  13. 13.110 × 4 =
  14. 14.12 × 8 =
  15. 15.20 × 8 =
  16. 16.61 × 4 =
  17. 17.117 × 4 =
  18. 18.31 × 8 =
  19. 19.54 × 8 =
  20. 20.74 × 4 =
  21. 21.69 × 8 =
  22. 22.141 × 4 =
  23. 23.104 × 4 =
  24. 24.65 × 8 =
  25. 25.32 × 8 =
  26. 26.72 × 4 =
  27. 27.110 × 4 =
  28. 28.58 × 8 =
  29. 29.73 × 4 =
  30. 30.95 × 4 =
  31. 31.23 × 8 =
  32. 32.37 × 4 =
  33. 33.28 × 4 =
  34. 34.66 × 8 =
  35. 35.149 × 4 =
  36. 36.49 × 8 =
  37. 37.70 × 8 =
  38. 38.81 × 4 =
  39. 39.18 × 8 =
  40. 40.100 × 4 =

Answer key

  1. 104
  2. 432
  3. 232
  4. 480
  5. 216
  6. 112
  7. 240
  8. 528
  9. 192
  10. 132
  11. 460
  12. 628
  13. 440
  14. 96
  15. 160
  16. 244
  17. 468
  18. 248
  19. 432
  20. 296
  21. 552
  22. 564
  23. 416
  24. 520
  25. 256
  26. 288
  27. 440
  28. 464
  29. 292
  30. 380
  31. 184
  32. 148
  33. 112
  34. 528
  35. 596
  36. 392
  37. 560
  38. 324
  39. 144
  40. 400

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