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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 793 · 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. 1.54 × 4 =
  2. 2.75 × 4 =
  3. 3.32 × 4 =
  4. 4.27 × 8 =
  5. 5.141 × 4 =
  6. 6.44 × 8 =
  7. 7.24 × 8 =
  8. 8.31 × 4 =
  9. 9.80 × 4 =
  10. 10.155 × 4 =
  11. 11.93 × 4 =
  12. 12.54 × 4 =
  13. 13.68 × 8 =
  14. 14.79 × 4 =
  15. 15.160 × 4 =
  16. 16.24 × 8 =
  17. 17.15 × 8 =
  18. 18.25 × 4 =
  19. 19.31 × 4 =
  20. 20.31 × 4 =
  21. 21.111 × 4 =
  22. 22.32 × 4 =
  23. 23.27 × 8 =
  24. 24.47 × 4 =
  25. 25.145 × 4 =
  26. 26.128 × 4 =
  27. 27.44 × 4 =
  28. 28.41 × 8 =
  29. 29.43 × 8 =
  30. 30.75 × 8 =
  31. 31.52 × 4 =
  32. 32.13 × 8 =
  33. 33.54 × 8 =
  34. 34.109 × 4 =
  35. 35.68 × 8 =
  36. 36.42 × 4 =
  37. 37.47 × 4 =
  38. 38.51 × 8 =
  39. 39.128 × 4 =
  40. 40.70 × 8 =

Answer key

  1. 216
  2. 300
  3. 128
  4. 216
  5. 564
  6. 352
  7. 192
  8. 124
  9. 320
  10. 620
  11. 372
  12. 216
  13. 544
  14. 316
  15. 640
  16. 192
  17. 120
  18. 100
  19. 124
  20. 124
  21. 444
  22. 128
  23. 216
  24. 188
  25. 580
  26. 512
  27. 176
  28. 328
  29. 344
  30. 600
  31. 208
  32. 104
  33. 432
  34. 436
  35. 544
  36. 168
  37. 188
  38. 408
  39. 512
  40. 560

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