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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 653 · 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. 1.100 × 4 =
  2. 2.74 × 4 =
  3. 3.82 × 4 =
  4. 4.25 × 8 =
  5. 5.50 × 4 =
  6. 6.28 × 4 =
  7. 7.152 × 4 =
  8. 8.28 × 4 =
  9. 9.18 × 4 =
  10. 10.58 × 8 =
  11. 11.24 × 8 =
  12. 12.43 × 4 =
  13. 13.61 × 8 =
  14. 14.60 × 8 =
  15. 15.69 × 4 =
  16. 16.106 × 4 =
  17. 17.48 × 4 =
  18. 18.51 × 8 =
  19. 19.90 × 4 =
  20. 20.15 × 8 =
  21. 21.44 × 8 =
  22. 22.64 × 8 =
  23. 23.23 × 4 =
  24. 24.32 × 4 =
  25. 25.26 × 8 =
  26. 26.18 × 4 =
  27. 27.38 × 8 =
  28. 28.54 × 8 =
  29. 29.22 × 8 =
  30. 30.30 × 4 =
  31. 31.44 × 4 =
  32. 32.159 × 4 =
  33. 33.32 × 4 =
  34. 34.22 × 8 =
  35. 35.18 × 8 =
  36. 36.156 × 4 =
  37. 37.66 × 8 =
  38. 38.76 × 4 =
  39. 39.26 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 400
  2. 296
  3. 328
  4. 200
  5. 200
  6. 112
  7. 608
  8. 112
  9. 72
  10. 464
  11. 192
  12. 172
  13. 488
  14. 480
  15. 276
  16. 424
  17. 192
  18. 408
  19. 360
  20. 120
  21. 352
  22. 512
  23. 92
  24. 128
  25. 208
  26. 72
  27. 304
  28. 432
  29. 176
  30. 120
  31. 176
  32. 636
  33. 128
  34. 176
  35. 144
  36. 624
  37. 528
  38. 304
  39. 208
  40. 144

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