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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 231 · 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. 1.73 × 8 =
  2. 2.15 × 8 =
  3. 3.17 × 4 =
  4. 4.63 × 4 =
  5. 5.67 × 8 =
  6. 6.135 × 4 =
  7. 7.30 × 4 =
  8. 8.58 × 4 =
  9. 9.35 × 4 =
  10. 10.24 × 8 =
  11. 11.34 × 8 =
  12. 12.13 × 8 =
  13. 13.44 × 8 =
  14. 14.31 × 8 =
  15. 15.104 × 4 =
  16. 16.156 × 4 =
  17. 17.42 × 4 =
  18. 18.139 × 4 =
  19. 19.44 × 4 =
  20. 20.65 × 8 =
  21. 21.66 × 8 =
  22. 22.44 × 4 =
  23. 23.69 × 8 =
  24. 24.40 × 8 =
  25. 25.39 × 4 =
  26. 26.38 × 8 =
  27. 27.45 × 8 =
  28. 28.67 × 4 =
  29. 29.18 × 4 =
  30. 30.72 × 8 =
  31. 31.55 × 4 =
  32. 32.73 × 4 =
  33. 33.150 × 4 =
  34. 34.70 × 8 =
  35. 35.131 × 4 =
  36. 36.79 × 4 =
  37. 37.15 × 4 =
  38. 38.47 × 8 =
  39. 39.78 × 4 =
  40. 40.81 × 4 =

Answer key

  1. 584
  2. 120
  3. 68
  4. 252
  5. 536
  6. 540
  7. 120
  8. 232
  9. 140
  10. 192
  11. 272
  12. 104
  13. 352
  14. 248
  15. 416
  16. 624
  17. 168
  18. 556
  19. 176
  20. 520
  21. 528
  22. 176
  23. 552
  24. 320
  25. 156
  26. 304
  27. 360
  28. 268
  29. 72
  30. 576
  31. 220
  32. 292
  33. 600
  34. 560
  35. 524
  36. 316
  37. 60
  38. 376
  39. 312
  40. 324

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