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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 71 · 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. 1.82 × 4 =
  2. 2.75 × 8 =
  3. 3.48 × 4 =
  4. 4.98 × 4 =
  5. 5.47 × 8 =
  6. 6.17 × 4 =
  7. 7.45 × 8 =
  8. 8.73 × 8 =
  9. 9.63 × 8 =
  10. 10.83 × 4 =
  11. 11.121 × 4 =
  12. 12.160 × 4 =
  13. 13.39 × 8 =
  14. 14.22 × 8 =
  15. 15.61 × 8 =
  16. 16.41 × 4 =
  17. 17.13 × 8 =
  18. 18.58 × 8 =
  19. 19.18 × 8 =
  20. 20.57 × 4 =
  21. 21.88 × 4 =
  22. 22.27 × 8 =
  23. 23.77 × 4 =
  24. 24.35 × 8 =
  25. 25.124 × 4 =
  26. 26.36 × 4 =
  27. 27.38 × 4 =
  28. 28.30 × 8 =
  29. 29.14 × 8 =
  30. 30.128 × 4 =
  31. 31.69 × 8 =
  32. 32.59 × 4 =
  33. 33.36 × 8 =
  34. 34.26 × 8 =
  35. 35.31 × 4 =
  36. 36.54 × 8 =
  37. 37.29 × 4 =
  38. 38.28 × 4 =
  39. 39.37 × 4 =
  40. 40.119 × 4 =

Answer key

  1. 328
  2. 600
  3. 192
  4. 392
  5. 376
  6. 68
  7. 360
  8. 584
  9. 504
  10. 332
  11. 484
  12. 640
  13. 312
  14. 176
  15. 488
  16. 164
  17. 104
  18. 464
  19. 144
  20. 228
  21. 352
  22. 216
  23. 308
  24. 280
  25. 496
  26. 144
  27. 152
  28. 240
  29. 112
  30. 512
  31. 552
  32. 236
  33. 288
  34. 208
  35. 124
  36. 432
  37. 116
  38. 112
  39. 148
  40. 476

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