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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 550 · 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. 1.41 × 4 =
  2. 2.113 × 4 =
  3. 3.46 × 8 =
  4. 4.21 × 8 =
  5. 5.156 × 4 =
  6. 6.47 × 8 =
  7. 7.59 × 8 =
  8. 8.70 × 8 =
  9. 9.52 × 4 =
  10. 10.48 × 8 =
  11. 11.24 × 4 =
  12. 12.45 × 4 =
  13. 13.52 × 4 =
  14. 14.69 × 4 =
  15. 15.48 × 8 =
  16. 16.96 × 4 =
  17. 17.44 × 8 =
  18. 18.55 × 8 =
  19. 19.60 × 4 =
  20. 20.160 × 4 =
  21. 21.18 × 8 =
  22. 22.68 × 8 =
  23. 23.63 × 8 =
  24. 24.71 × 8 =
  25. 25.14 × 4 =
  26. 26.48 × 4 =
  27. 27.24 × 8 =
  28. 28.21 × 4 =
  29. 29.22 × 4 =
  30. 30.28 × 8 =
  31. 31.21 × 8 =
  32. 32.13 × 4 =
  33. 33.50 × 4 =
  34. 34.127 × 4 =
  35. 35.23 × 4 =
  36. 36.68 × 4 =
  37. 37.36 × 4 =
  38. 38.45 × 4 =
  39. 39.41 × 4 =
  40. 40.14 × 8 =

Answer key

  1. 164
  2. 452
  3. 368
  4. 168
  5. 624
  6. 376
  7. 472
  8. 560
  9. 208
  10. 384
  11. 96
  12. 180
  13. 208
  14. 276
  15. 384
  16. 384
  17. 352
  18. 440
  19. 240
  20. 640
  21. 144
  22. 544
  23. 504
  24. 568
  25. 56
  26. 192
  27. 192
  28. 84
  29. 88
  30. 224
  31. 168
  32. 52
  33. 200
  34. 508
  35. 92
  36. 272
  37. 144
  38. 180
  39. 164
  40. 112

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