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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 902 · 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. 1.21 × 8 =
  2. 2.95 × 4 =
  3. 3.71 × 8 =
  4. 4.58 × 4 =
  5. 5.98 × 4 =
  6. 6.99 × 4 =
  7. 7.143 × 4 =
  8. 8.51 × 8 =
  9. 9.15 × 8 =
  10. 10.16 × 8 =
  11. 11.157 × 4 =
  12. 12.128 × 4 =
  13. 13.91 × 4 =
  14. 14.26 × 8 =
  15. 15.26 × 8 =
  16. 16.86 × 4 =
  17. 17.67 × 4 =
  18. 18.37 × 8 =
  19. 19.75 × 4 =
  20. 20.86 × 4 =
  21. 21.90 × 4 =
  22. 22.37 × 8 =
  23. 23.20 × 4 =
  24. 24.62 × 8 =
  25. 25.17 × 8 =
  26. 26.155 × 4 =
  27. 27.80 × 4 =
  28. 28.91 × 4 =
  29. 29.121 × 4 =
  30. 30.29 × 4 =
  31. 31.61 × 8 =
  32. 32.44 × 4 =
  33. 33.30 × 8 =
  34. 34.20 × 4 =
  35. 35.66 × 8 =
  36. 36.65 × 8 =
  37. 37.77 × 4 =
  38. 38.15 × 8 =
  39. 39.135 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 168
  2. 380
  3. 568
  4. 232
  5. 392
  6. 396
  7. 572
  8. 408
  9. 120
  10. 128
  11. 628
  12. 512
  13. 364
  14. 208
  15. 208
  16. 344
  17. 268
  18. 296
  19. 300
  20. 344
  21. 360
  22. 296
  23. 80
  24. 496
  25. 136
  26. 620
  27. 320
  28. 364
  29. 484
  30. 116
  31. 488
  32. 176
  33. 240
  34. 80
  35. 528
  36. 520
  37. 308
  38. 120
  39. 540
  40. 192

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