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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 621 · 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. 1.141 × 4 =
  2. 2.63 × 8 =
  3. 3.95 × 4 =
  4. 4.138 × 4 =
  5. 5.33 × 8 =
  6. 6.30 × 8 =
  7. 7.29 × 4 =
  8. 8.21 × 4 =
  9. 9.52 × 8 =
  10. 10.64 × 8 =
  11. 11.116 × 4 =
  12. 12.76 × 4 =
  13. 13.15 × 8 =
  14. 14.22 × 4 =
  15. 15.26 × 8 =
  16. 16.43 × 8 =
  17. 17.125 × 4 =
  18. 18.52 × 8 =
  19. 19.31 × 8 =
  20. 20.54 × 8 =
  21. 21.27 × 8 =
  22. 22.74 × 8 =
  23. 23.134 × 4 =
  24. 24.97 × 4 =
  25. 25.61 × 4 =
  26. 26.70 × 4 =
  27. 27.19 × 8 =
  28. 28.147 × 4 =
  29. 29.63 × 4 =
  30. 30.49 × 8 =
  31. 31.36 × 8 =
  32. 32.28 × 8 =
  33. 33.31 × 8 =
  34. 34.31 × 4 =
  35. 35.13 × 8 =
  36. 36.54 × 8 =
  37. 37.107 × 4 =
  38. 38.96 × 4 =
  39. 39.12 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 564
  2. 504
  3. 380
  4. 552
  5. 264
  6. 240
  7. 116
  8. 84
  9. 416
  10. 512
  11. 464
  12. 304
  13. 120
  14. 88
  15. 208
  16. 344
  17. 500
  18. 416
  19. 248
  20. 432
  21. 216
  22. 592
  23. 536
  24. 388
  25. 244
  26. 280
  27. 152
  28. 588
  29. 252
  30. 392
  31. 288
  32. 224
  33. 248
  34. 124
  35. 104
  36. 432
  37. 428
  38. 384
  39. 96
  40. 112

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