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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 200 · 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. 1.119 × 4 =
  2. 2.55 × 8 =
  3. 3.55 × 8 =
  4. 4.20 × 4 =
  5. 5.101 × 4 =
  6. 6.19 × 8 =
  7. 7.66 × 8 =
  8. 8.48 × 8 =
  9. 9.59 × 8 =
  10. 10.27 × 8 =
  11. 11.31 × 8 =
  12. 12.48 × 8 =
  13. 13.156 × 4 =
  14. 14.124 × 4 =
  15. 15.109 × 4 =
  16. 16.19 × 8 =
  17. 17.35 × 4 =
  18. 18.41 × 8 =
  19. 19.71 × 8 =
  20. 20.54 × 8 =
  21. 21.79 × 4 =
  22. 22.54 × 4 =
  23. 23.50 × 4 =
  24. 24.30 × 4 =
  25. 25.30 × 8 =
  26. 26.144 × 4 =
  27. 27.31 × 8 =
  28. 28.17 × 8 =
  29. 29.48 × 4 =
  30. 30.136 × 4 =
  31. 31.153 × 4 =
  32. 32.58 × 4 =
  33. 33.158 × 4 =
  34. 34.52 × 4 =
  35. 35.87 × 4 =
  36. 36.33 × 8 =
  37. 37.25 × 4 =
  38. 38.43 × 8 =
  39. 39.68 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 476
  2. 440
  3. 440
  4. 80
  5. 404
  6. 152
  7. 528
  8. 384
  9. 472
  10. 216
  11. 248
  12. 384
  13. 624
  14. 496
  15. 436
  16. 152
  17. 140
  18. 328
  19. 568
  20. 432
  21. 316
  22. 216
  23. 200
  24. 120
  25. 240
  26. 576
  27. 248
  28. 136
  29. 192
  30. 544
  31. 612
  32. 232
  33. 632
  34. 208
  35. 348
  36. 264
  37. 100
  38. 344
  39. 272
  40. 208

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