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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 909 · 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. 1.74 × 4 =
  2. 2.63 × 8 =
  3. 3.65 × 4 =
  4. 4.84 × 4 =
  5. 5.52 × 8 =
  6. 6.130 × 4 =
  7. 7.32 × 4 =
  8. 8.88 × 4 =
  9. 9.121 × 4 =
  10. 10.139 × 4 =
  11. 11.13 × 8 =
  12. 12.24 × 8 =
  13. 13.75 × 8 =
  14. 14.86 × 4 =
  15. 15.89 × 4 =
  16. 16.66 × 8 =
  17. 17.43 × 8 =
  18. 18.12 × 8 =
  19. 19.66 × 4 =
  20. 20.29 × 8 =
  21. 21.59 × 8 =
  22. 22.30 × 8 =
  23. 23.56 × 8 =
  24. 24.118 × 4 =
  25. 25.51 × 8 =
  26. 26.33 × 8 =
  27. 27.18 × 4 =
  28. 28.110 × 4 =
  29. 29.38 × 4 =
  30. 30.13 × 4 =
  31. 31.55 × 8 =
  32. 32.26 × 8 =
  33. 33.52 × 8 =
  34. 34.13 × 8 =
  35. 35.140 × 4 =
  36. 36.77 × 4 =
  37. 37.57 × 8 =
  38. 38.58 × 4 =
  39. 39.69 × 8 =
  40. 40.59 × 4 =

Answer key

  1. 296
  2. 504
  3. 260
  4. 336
  5. 416
  6. 520
  7. 128
  8. 352
  9. 484
  10. 556
  11. 104
  12. 192
  13. 600
  14. 344
  15. 356
  16. 528
  17. 344
  18. 96
  19. 264
  20. 232
  21. 472
  22. 240
  23. 448
  24. 472
  25. 408
  26. 264
  27. 72
  28. 440
  29. 152
  30. 52
  31. 440
  32. 208
  33. 416
  34. 104
  35. 560
  36. 308
  37. 456
  38. 232
  39. 552
  40. 236

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