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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 992 · 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. 1.16 × 4 =
  2. 2.29 × 8 =
  3. 3.46 × 8 =
  4. 4.150 × 4 =
  5. 5.77 × 4 =
  6. 6.30 × 4 =
  7. 7.108 × 4 =
  8. 8.113 × 4 =
  9. 9.27 × 4 =
  10. 10.113 × 4 =
  11. 11.67 × 4 =
  12. 12.62 × 8 =
  13. 13.38 × 4 =
  14. 14.59 × 8 =
  15. 15.37 × 4 =
  16. 16.63 × 4 =
  17. 17.104 × 4 =
  18. 18.61 × 8 =
  19. 19.52 × 4 =
  20. 20.122 × 4 =
  21. 21.37 × 4 =
  22. 22.52 × 4 =
  23. 23.104 × 4 =
  24. 24.149 × 4 =
  25. 25.135 × 4 =
  26. 26.36 × 4 =
  27. 27.55 × 8 =
  28. 28.115 × 4 =
  29. 29.131 × 4 =
  30. 30.44 × 8 =
  31. 31.22 × 8 =
  32. 32.25 × 8 =
  33. 33.151 × 4 =
  34. 34.57 × 8 =
  35. 35.69 × 8 =
  36. 36.24 × 4 =
  37. 37.118 × 4 =
  38. 38.29 × 4 =
  39. 39.26 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 64
  2. 232
  3. 368
  4. 600
  5. 308
  6. 120
  7. 432
  8. 452
  9. 108
  10. 452
  11. 268
  12. 496
  13. 152
  14. 472
  15. 148
  16. 252
  17. 416
  18. 488
  19. 208
  20. 488
  21. 148
  22. 208
  23. 416
  24. 596
  25. 540
  26. 144
  27. 440
  28. 460
  29. 524
  30. 352
  31. 176
  32. 200
  33. 604
  34. 456
  35. 552
  36. 96
  37. 472
  38. 116
  39. 104
  40. 252

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