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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 939 · 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. 1.57 × 8 =
  2. 2.113 × 4 =
  3. 3.33 × 4 =
  4. 4.33 × 8 =
  5. 5.56 × 4 =
  6. 6.37 × 8 =
  7. 7.111 × 4 =
  8. 8.46 × 8 =
  9. 9.87 × 4 =
  10. 10.40 × 8 =
  11. 11.32 × 8 =
  12. 12.41 × 4 =
  13. 13.69 × 8 =
  14. 14.48 × 8 =
  15. 15.23 × 4 =
  16. 16.100 × 4 =
  17. 17.33 × 8 =
  18. 18.111 × 4 =
  19. 19.37 × 8 =
  20. 20.67 × 4 =
  21. 21.43 × 8 =
  22. 22.30 × 8 =
  23. 23.108 × 4 =
  24. 24.15 × 8 =
  25. 25.113 × 4 =
  26. 26.27 × 8 =
  27. 27.42 × 8 =
  28. 28.61 × 4 =
  29. 29.17 × 4 =
  30. 30.70 × 8 =
  31. 31.53 × 8 =
  32. 32.61 × 4 =
  33. 33.28 × 8 =
  34. 34.109 × 4 =
  35. 35.57 × 8 =
  36. 36.51 × 8 =
  37. 37.12 × 8 =
  38. 38.71 × 8 =
  39. 39.39 × 4 =
  40. 40.122 × 4 =

Answer key

  1. 456
  2. 452
  3. 132
  4. 264
  5. 224
  6. 296
  7. 444
  8. 368
  9. 348
  10. 320
  11. 256
  12. 164
  13. 552
  14. 384
  15. 92
  16. 400
  17. 264
  18. 444
  19. 296
  20. 268
  21. 344
  22. 240
  23. 432
  24. 120
  25. 452
  26. 216
  27. 336
  28. 244
  29. 68
  30. 560
  31. 424
  32. 244
  33. 224
  34. 436
  35. 456
  36. 408
  37. 96
  38. 568
  39. 156
  40. 488

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