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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 473 · 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. 1.29 × 4 =
  2. 2.76 × 4 =
  3. 3.101 × 4 =
  4. 4.19 × 4 =
  5. 5.121 × 4 =
  6. 6.49 × 8 =
  7. 7.108 × 4 =
  8. 8.29 × 8 =
  9. 9.147 × 4 =
  10. 10.108 × 4 =
  11. 11.21 × 4 =
  12. 12.142 × 4 =
  13. 13.75 × 8 =
  14. 14.14 × 8 =
  15. 15.22 × 8 =
  16. 16.54 × 4 =
  17. 17.32 × 8 =
  18. 18.48 × 4 =
  19. 19.73 × 4 =
  20. 20.106 × 4 =
  21. 21.73 × 8 =
  22. 22.61 × 4 =
  23. 23.39 × 8 =
  24. 24.60 × 8 =
  25. 25.58 × 8 =
  26. 26.148 × 4 =
  27. 27.18 × 8 =
  28. 28.53 × 4 =
  29. 29.57 × 4 =
  30. 30.52 × 8 =
  31. 31.78 × 4 =
  32. 32.57 × 4 =
  33. 33.33 × 8 =
  34. 34.43 × 4 =
  35. 35.147 × 4 =
  36. 36.30 × 8 =
  37. 37.76 × 4 =
  38. 38.67 × 8 =
  39. 39.43 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 116
  2. 304
  3. 404
  4. 76
  5. 484
  6. 392
  7. 432
  8. 232
  9. 588
  10. 432
  11. 84
  12. 568
  13. 600
  14. 112
  15. 176
  16. 216
  17. 256
  18. 192
  19. 292
  20. 424
  21. 584
  22. 244
  23. 312
  24. 480
  25. 464
  26. 592
  27. 144
  28. 212
  29. 228
  30. 416
  31. 312
  32. 228
  33. 264
  34. 172
  35. 588
  36. 240
  37. 304
  38. 536
  39. 172
  40. 104

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