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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 618 · 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. 1.108 × 4 =
  2. 2.26 × 8 =
  3. 3.105 × 4 =
  4. 4.77 × 4 =
  5. 5.42 × 8 =
  6. 6.61 × 4 =
  7. 7.142 × 4 =
  8. 8.26 × 4 =
  9. 9.29 × 8 =
  10. 10.16 × 8 =
  11. 11.19 × 4 =
  12. 12.17 × 4 =
  13. 13.90 × 4 =
  14. 14.49 × 4 =
  15. 15.69 × 8 =
  16. 16.45 × 8 =
  17. 17.37 × 4 =
  18. 18.17 × 4 =
  19. 19.75 × 8 =
  20. 20.74 × 8 =
  21. 21.15 × 8 =
  22. 22.38 × 8 =
  23. 23.124 × 4 =
  24. 24.55 × 8 =
  25. 25.13 × 4 =
  26. 26.25 × 8 =
  27. 27.25 × 8 =
  28. 28.44 × 8 =
  29. 29.138 × 4 =
  30. 30.29 × 4 =
  31. 31.37 × 8 =
  32. 32.51 × 8 =
  33. 33.113 × 4 =
  34. 34.38 × 4 =
  35. 35.122 × 4 =
  36. 36.71 × 4 =
  37. 37.50 × 8 =
  38. 38.68 × 8 =
  39. 39.160 × 4 =
  40. 40.118 × 4 =

Answer key

  1. 432
  2. 208
  3. 420
  4. 308
  5. 336
  6. 244
  7. 568
  8. 104
  9. 232
  10. 128
  11. 76
  12. 68
  13. 360
  14. 196
  15. 552
  16. 360
  17. 148
  18. 68
  19. 600
  20. 592
  21. 120
  22. 304
  23. 496
  24. 440
  25. 52
  26. 200
  27. 200
  28. 352
  29. 552
  30. 116
  31. 296
  32. 408
  33. 452
  34. 152
  35. 488
  36. 284
  37. 400
  38. 544
  39. 640
  40. 472

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