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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 571 · 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. 2.155 × 4 =
  3. 3.20 × 8 =
  4. 4.38 × 4 =
  5. 5.50 × 4 =
  6. 6.37 × 4 =
  7. 7.46 × 8 =
  8. 8.79 × 4 =
  9. 9.45 × 4 =
  10. 10.45 × 8 =
  11. 11.70 × 4 =
  12. 12.35 × 8 =
  13. 13.27 × 8 =
  14. 14.38 × 4 =
  15. 15.92 × 4 =
  16. 16.106 × 4 =
  17. 17.15 × 8 =
  18. 18.51 × 4 =
  19. 19.40 × 8 =
  20. 20.81 × 4 =
  21. 21.22 × 8 =
  22. 22.54 × 4 =
  23. 23.20 × 4 =
  24. 24.69 × 8 =
  25. 25.23 × 8 =
  26. 26.29 × 4 =
  27. 27.22 × 4 =
  28. 28.75 × 8 =
  29. 29.15 × 4 =
  30. 30.55 × 8 =
  31. 31.42 × 8 =
  32. 32.41 × 8 =
  33. 33.124 × 4 =
  34. 34.60 × 8 =
  35. 35.96 × 4 =
  36. 36.40 × 4 =
  37. 37.15 × 8 =
  38. 38.18 × 8 =
  39. 39.37 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 104
  2. 620
  3. 160
  4. 152
  5. 200
  6. 148
  7. 368
  8. 316
  9. 180
  10. 360
  11. 280
  12. 280
  13. 216
  14. 152
  15. 368
  16. 424
  17. 120
  18. 204
  19. 320
  20. 324
  21. 176
  22. 216
  23. 80
  24. 552
  25. 184
  26. 116
  27. 88
  28. 600
  29. 60
  30. 440
  31. 336
  32. 328
  33. 496
  34. 480
  35. 384
  36. 160
  37. 120
  38. 144
  39. 148
  40. 140

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