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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 898 · 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. 1.34 × 8 =
  2. 2.52 × 4 =
  3. 3.51 × 4 =
  4. 4.44 × 4 =
  5. 5.62 × 8 =
  6. 6.56 × 8 =
  7. 7.108 × 4 =
  8. 8.111 × 4 =
  9. 9.12 × 8 =
  10. 10.29 × 8 =
  11. 11.33 × 8 =
  12. 12.76 × 4 =
  13. 13.42 × 8 =
  14. 14.27 × 4 =
  15. 15.63 × 4 =
  16. 16.69 × 4 =
  17. 17.144 × 4 =
  18. 18.73 × 4 =
  19. 19.38 × 8 =
  20. 20.94 × 4 =
  21. 21.130 × 4 =
  22. 22.20 × 4 =
  23. 23.142 × 4 =
  24. 24.68 × 8 =
  25. 25.69 × 8 =
  26. 26.22 × 8 =
  27. 27.107 × 4 =
  28. 28.55 × 4 =
  29. 29.44 × 8 =
  30. 30.50 × 8 =
  31. 31.33 × 8 =
  32. 32.149 × 4 =
  33. 33.159 × 4 =
  34. 34.37 × 4 =
  35. 35.31 × 8 =
  36. 36.34 × 4 =
  37. 37.138 × 4 =
  38. 38.75 × 8 =
  39. 39.22 × 4 =
  40. 40.99 × 4 =

Answer key

  1. 272
  2. 208
  3. 204
  4. 176
  5. 496
  6. 448
  7. 432
  8. 444
  9. 96
  10. 232
  11. 264
  12. 304
  13. 336
  14. 108
  15. 252
  16. 276
  17. 576
  18. 292
  19. 304
  20. 376
  21. 520
  22. 80
  23. 568
  24. 544
  25. 552
  26. 176
  27. 428
  28. 220
  29. 352
  30. 400
  31. 264
  32. 596
  33. 636
  34. 148
  35. 248
  36. 136
  37. 552
  38. 600
  39. 88
  40. 396

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