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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 896 · 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. 1.143 × 4 =
  2. 2.38 × 4 =
  3. 3.47 × 4 =
  4. 4.102 × 4 =
  5. 5.14 × 4 =
  6. 6.93 × 4 =
  7. 7.50 × 8 =
  8. 8.135 × 4 =
  9. 9.35 × 8 =
  10. 10.25 × 8 =
  11. 11.27 × 4 =
  12. 12.100 × 4 =
  13. 13.72 × 4 =
  14. 14.80 × 4 =
  15. 15.151 × 4 =
  16. 16.152 × 4 =
  17. 17.110 × 4 =
  18. 18.56 × 8 =
  19. 19.123 × 4 =
  20. 20.33 × 8 =
  21. 21.29 × 8 =
  22. 22.36 × 4 =
  23. 23.77 × 4 =
  24. 24.147 × 4 =
  25. 25.19 × 4 =
  26. 26.66 × 8 =
  27. 27.160 × 4 =
  28. 28.50 × 8 =
  29. 29.47 × 4 =
  30. 30.27 × 8 =
  31. 31.27 × 8 =
  32. 32.58 × 8 =
  33. 33.51 × 8 =
  34. 34.26 × 8 =
  35. 35.30 × 8 =
  36. 36.121 × 4 =
  37. 37.36 × 8 =
  38. 38.100 × 4 =
  39. 39.72 × 8 =
  40. 40.53 × 8 =

Answer key

  1. 572
  2. 152
  3. 188
  4. 408
  5. 56
  6. 372
  7. 400
  8. 540
  9. 280
  10. 200
  11. 108
  12. 400
  13. 288
  14. 320
  15. 604
  16. 608
  17. 440
  18. 448
  19. 492
  20. 264
  21. 232
  22. 144
  23. 308
  24. 588
  25. 76
  26. 528
  27. 640
  28. 400
  29. 188
  30. 216
  31. 216
  32. 464
  33. 408
  34. 208
  35. 240
  36. 484
  37. 288
  38. 400
  39. 576
  40. 424

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