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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 985 · 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. 1.158 × 4 =
  2. 2.150 × 4 =
  3. 3.13 × 8 =
  4. 4.50 × 4 =
  5. 5.30 × 8 =
  6. 6.153 × 4 =
  7. 7.39 × 4 =
  8. 8.23 × 8 =
  9. 9.51 × 8 =
  10. 10.31 × 4 =
  11. 11.85 × 4 =
  12. 12.33 × 8 =
  13. 13.44 × 4 =
  14. 14.19 × 8 =
  15. 15.73 × 8 =
  16. 16.62 × 8 =
  17. 17.37 × 4 =
  18. 18.157 × 4 =
  19. 19.78 × 4 =
  20. 20.115 × 4 =
  21. 21.26 × 8 =
  22. 22.33 × 4 =
  23. 23.34 × 4 =
  24. 24.20 × 4 =
  25. 25.90 × 4 =
  26. 26.20 × 4 =
  27. 27.36 × 4 =
  28. 28.64 × 8 =
  29. 29.107 × 4 =
  30. 30.62 × 8 =
  31. 31.68 × 4 =
  32. 32.72 × 8 =
  33. 33.97 × 4 =
  34. 34.50 × 8 =
  35. 35.88 × 4 =
  36. 36.32 × 8 =
  37. 37.23 × 8 =
  38. 38.14 × 4 =
  39. 39.70 × 4 =
  40. 40.125 × 4 =

Answer key

  1. 632
  2. 600
  3. 104
  4. 200
  5. 240
  6. 612
  7. 156
  8. 184
  9. 408
  10. 124
  11. 340
  12. 264
  13. 176
  14. 152
  15. 584
  16. 496
  17. 148
  18. 628
  19. 312
  20. 460
  21. 208
  22. 132
  23. 136
  24. 80
  25. 360
  26. 80
  27. 144
  28. 512
  29. 428
  30. 496
  31. 272
  32. 576
  33. 388
  34. 400
  35. 352
  36. 256
  37. 184
  38. 56
  39. 280
  40. 500

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