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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 192 · 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. 1.31 × 8 =
  2. 2.56 × 8 =
  3. 3.46 × 4 =
  4. 4.141 × 4 =
  5. 5.16 × 8 =
  6. 6.84 × 4 =
  7. 7.47 × 8 =
  8. 8.96 × 4 =
  9. 9.75 × 8 =
  10. 10.65 × 8 =
  11. 11.88 × 4 =
  12. 12.65 × 8 =
  13. 13.97 × 4 =
  14. 14.131 × 4 =
  15. 15.17 × 8 =
  16. 16.13 × 8 =
  17. 17.66 × 8 =
  18. 18.50 × 8 =
  19. 19.27 × 8 =
  20. 20.81 × 4 =
  21. 21.51 × 8 =
  22. 22.37 × 4 =
  23. 23.138 × 4 =
  24. 24.26 × 8 =
  25. 25.15 × 4 =
  26. 26.15 × 4 =
  27. 27.76 × 4 =
  28. 28.17 × 4 =
  29. 29.44 × 4 =
  30. 30.27 × 8 =
  31. 31.44 × 8 =
  32. 32.125 × 4 =
  33. 33.97 × 4 =
  34. 34.133 × 4 =
  35. 35.45 × 8 =
  36. 36.16 × 8 =
  37. 37.146 × 4 =
  38. 38.19 × 8 =
  39. 39.26 × 8 =
  40. 40.30 × 8 =

Answer key

  1. 248
  2. 448
  3. 184
  4. 564
  5. 128
  6. 336
  7. 376
  8. 384
  9. 600
  10. 520
  11. 352
  12. 520
  13. 388
  14. 524
  15. 136
  16. 104
  17. 528
  18. 400
  19. 216
  20. 324
  21. 408
  22. 148
  23. 552
  24. 208
  25. 60
  26. 60
  27. 304
  28. 68
  29. 176
  30. 216
  31. 352
  32. 500
  33. 388
  34. 532
  35. 360
  36. 128
  37. 584
  38. 152
  39. 208
  40. 240

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