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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 947 · 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. 1.26 × 8 =
  2. 2.32 × 4 =
  3. 3.73 × 8 =
  4. 4.118 × 4 =
  5. 5.63 × 8 =
  6. 6.13 × 8 =
  7. 7.38 × 4 =
  8. 8.48 × 8 =
  9. 9.37 × 8 =
  10. 10.24 × 8 =
  11. 11.120 × 4 =
  12. 12.44 × 8 =
  13. 13.15 × 8 =
  14. 14.70 × 4 =
  15. 15.23 × 8 =
  16. 16.71 × 4 =
  17. 17.108 × 4 =
  18. 18.25 × 8 =
  19. 19.69 × 4 =
  20. 20.69 × 8 =
  21. 21.82 × 4 =
  22. 22.17 × 8 =
  23. 23.54 × 4 =
  24. 24.58 × 8 =
  25. 25.52 × 4 =
  26. 26.34 × 8 =
  27. 27.61 × 4 =
  28. 28.54 × 8 =
  29. 29.35 × 8 =
  30. 30.20 × 8 =
  31. 31.66 × 4 =
  32. 32.31 × 4 =
  33. 33.50 × 4 =
  34. 34.96 × 4 =
  35. 35.146 × 4 =
  36. 36.25 × 4 =
  37. 37.59 × 4 =
  38. 38.48 × 4 =
  39. 39.20 × 4 =
  40. 40.74 × 8 =

Answer key

  1. 208
  2. 128
  3. 584
  4. 472
  5. 504
  6. 104
  7. 152
  8. 384
  9. 296
  10. 192
  11. 480
  12. 352
  13. 120
  14. 280
  15. 184
  16. 284
  17. 432
  18. 200
  19. 276
  20. 552
  21. 328
  22. 136
  23. 216
  24. 464
  25. 208
  26. 272
  27. 244
  28. 432
  29. 280
  30. 160
  31. 264
  32. 124
  33. 200
  34. 384
  35. 584
  36. 100
  37. 236
  38. 192
  39. 80
  40. 592

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