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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 375 · 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. 1.48 × 8 =
  2. 2.109 × 4 =
  3. 3.135 × 4 =
  4. 4.36 × 4 =
  5. 5.47 × 4 =
  6. 6.82 × 4 =
  7. 7.113 × 4 =
  8. 8.151 × 4 =
  9. 9.50 × 4 =
  10. 10.40 × 4 =
  11. 11.67 × 4 =
  12. 12.46 × 8 =
  13. 13.155 × 4 =
  14. 14.54 × 8 =
  15. 15.26 × 8 =
  16. 16.75 × 8 =
  17. 17.102 × 4 =
  18. 18.21 × 4 =
  19. 19.141 × 4 =
  20. 20.72 × 8 =
  21. 21.31 × 8 =
  22. 22.159 × 4 =
  23. 23.75 × 8 =
  24. 24.38 × 8 =
  25. 25.85 × 4 =
  26. 26.60 × 8 =
  27. 27.51 × 4 =
  28. 28.36 × 8 =
  29. 29.70 × 8 =
  30. 30.101 × 4 =
  31. 31.68 × 4 =
  32. 32.37 × 4 =
  33. 33.79 × 4 =
  34. 34.142 × 4 =
  35. 35.63 × 8 =
  36. 36.30 × 8 =
  37. 37.42 × 8 =
  38. 38.94 × 4 =
  39. 39.48 × 4 =
  40. 40.76 × 4 =

Answer key

  1. 384
  2. 436
  3. 540
  4. 144
  5. 188
  6. 328
  7. 452
  8. 604
  9. 200
  10. 160
  11. 268
  12. 368
  13. 620
  14. 432
  15. 208
  16. 600
  17. 408
  18. 84
  19. 564
  20. 576
  21. 248
  22. 636
  23. 600
  24. 304
  25. 340
  26. 480
  27. 204
  28. 288
  29. 560
  30. 404
  31. 272
  32. 148
  33. 316
  34. 568
  35. 504
  36. 240
  37. 336
  38. 376
  39. 192
  40. 304

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