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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 437 · 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. 1.28 × 8 =
  2. 2.70 × 8 =
  3. 3.32 × 8 =
  4. 4.61 × 8 =
  5. 5.59 × 8 =
  6. 6.16 × 4 =
  7. 7.41 × 4 =
  8. 8.63 × 4 =
  9. 9.59 × 4 =
  10. 10.91 × 4 =
  11. 11.41 × 8 =
  12. 12.47 × 4 =
  13. 13.55 × 4 =
  14. 14.63 × 8 =
  15. 15.45 × 4 =
  16. 16.30 × 8 =
  17. 17.138 × 4 =
  18. 18.62 × 4 =
  19. 19.67 × 8 =
  20. 20.32 × 8 =
  21. 21.155 × 4 =
  22. 22.27 × 8 =
  23. 23.44 × 4 =
  24. 24.52 × 4 =
  25. 25.73 × 4 =
  26. 26.35 × 8 =
  27. 27.147 × 4 =
  28. 28.25 × 8 =
  29. 29.33 × 8 =
  30. 30.136 × 4 =
  31. 31.92 × 4 =
  32. 32.37 × 4 =
  33. 33.44 × 4 =
  34. 34.48 × 4 =
  35. 35.13 × 8 =
  36. 36.82 × 4 =
  37. 37.44 × 8 =
  38. 38.79 × 4 =
  39. 39.71 × 8 =
  40. 40.146 × 4 =

Answer key

  1. 224
  2. 560
  3. 256
  4. 488
  5. 472
  6. 64
  7. 164
  8. 252
  9. 236
  10. 364
  11. 328
  12. 188
  13. 220
  14. 504
  15. 180
  16. 240
  17. 552
  18. 248
  19. 536
  20. 256
  21. 620
  22. 216
  23. 176
  24. 208
  25. 292
  26. 280
  27. 588
  28. 200
  29. 264
  30. 544
  31. 368
  32. 148
  33. 176
  34. 192
  35. 104
  36. 328
  37. 352
  38. 316
  39. 568
  40. 584

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