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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 459 · 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. 1.70 × 8 =
  2. 2.83 × 4 =
  3. 3.24 × 4 =
  4. 4.21 × 8 =
  5. 5.159 × 4 =
  6. 6.18 × 8 =
  7. 7.56 × 8 =
  8. 8.60 × 8 =
  9. 9.69 × 8 =
  10. 10.43 × 8 =
  11. 11.141 × 4 =
  12. 12.72 × 8 =
  13. 13.153 × 4 =
  14. 14.147 × 4 =
  15. 15.18 × 8 =
  16. 16.13 × 8 =
  17. 17.67 × 8 =
  18. 18.38 × 8 =
  19. 19.103 × 4 =
  20. 20.54 × 8 =
  21. 21.140 × 4 =
  22. 22.58 × 4 =
  23. 23.54 × 8 =
  24. 24.19 × 4 =
  25. 25.40 × 8 =
  26. 26.123 × 4 =
  27. 27.39 × 4 =
  28. 28.126 × 4 =
  29. 29.29 × 8 =
  30. 30.159 × 4 =
  31. 31.72 × 4 =
  32. 32.13 × 8 =
  33. 33.96 × 4 =
  34. 34.40 × 4 =
  35. 35.109 × 4 =
  36. 36.50 × 8 =
  37. 37.42 × 8 =
  38. 38.61 × 4 =
  39. 39.13 × 4 =
  40. 40.56 × 4 =

Answer key

  1. 560
  2. 332
  3. 96
  4. 168
  5. 636
  6. 144
  7. 448
  8. 480
  9. 552
  10. 344
  11. 564
  12. 576
  13. 612
  14. 588
  15. 144
  16. 104
  17. 536
  18. 304
  19. 412
  20. 432
  21. 560
  22. 232
  23. 432
  24. 76
  25. 320
  26. 492
  27. 156
  28. 504
  29. 232
  30. 636
  31. 288
  32. 104
  33. 384
  34. 160
  35. 436
  36. 400
  37. 336
  38. 244
  39. 52
  40. 224

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