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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 925 · 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. 1.13 × 4 =
  2. 2.27 × 8 =
  3. 3.139 × 4 =
  4. 4.154 × 4 =
  5. 5.40 × 8 =
  6. 6.37 × 8 =
  7. 7.57 × 8 =
  8. 8.64 × 8 =
  9. 9.25 × 8 =
  10. 10.25 × 4 =
  11. 11.76 × 4 =
  12. 12.150 × 4 =
  13. 13.101 × 4 =
  14. 14.29 × 8 =
  15. 15.62 × 8 =
  16. 16.137 × 4 =
  17. 17.14 × 8 =
  18. 18.64 × 8 =
  19. 19.15 × 8 =
  20. 20.57 × 4 =
  21. 21.66 × 4 =
  22. 22.70 × 8 =
  23. 23.79 × 4 =
  24. 24.32 × 4 =
  25. 25.141 × 4 =
  26. 26.67 × 8 =
  27. 27.74 × 4 =
  28. 28.56 × 8 =
  29. 29.115 × 4 =
  30. 30.140 × 4 =
  31. 31.34 × 8 =
  32. 32.65 × 4 =
  33. 33.85 × 4 =
  34. 34.40 × 8 =
  35. 35.37 × 8 =
  36. 36.107 × 4 =
  37. 37.136 × 4 =
  38. 38.26 × 4 =
  39. 39.117 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 52
  2. 216
  3. 556
  4. 616
  5. 320
  6. 296
  7. 456
  8. 512
  9. 200
  10. 100
  11. 304
  12. 600
  13. 404
  14. 232
  15. 496
  16. 548
  17. 112
  18. 512
  19. 120
  20. 228
  21. 264
  22. 560
  23. 316
  24. 128
  25. 564
  26. 536
  27. 296
  28. 448
  29. 460
  30. 560
  31. 272
  32. 260
  33. 340
  34. 320
  35. 296
  36. 428
  37. 544
  38. 104
  39. 468
  40. 296

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