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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 477 · 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. 1.51 × 4 =
  2. 2.68 × 8 =
  3. 3.12 × 8 =
  4. 4.17 × 4 =
  5. 5.37 × 4 =
  6. 6.97 × 4 =
  7. 7.59 × 8 =
  8. 8.28 × 8 =
  9. 9.50 × 8 =
  10. 10.82 × 4 =
  11. 11.29 × 8 =
  12. 12.33 × 8 =
  13. 13.62 × 8 =
  14. 14.104 × 4 =
  15. 15.107 × 4 =
  16. 16.49 × 8 =
  17. 17.55 × 4 =
  18. 18.128 × 4 =
  19. 19.129 × 4 =
  20. 20.157 × 4 =
  21. 21.35 × 8 =
  22. 22.25 × 4 =
  23. 23.152 × 4 =
  24. 24.68 × 8 =
  25. 25.47 × 4 =
  26. 26.58 × 8 =
  27. 27.75 × 4 =
  28. 28.44 × 8 =
  29. 29.27 × 8 =
  30. 30.91 × 4 =
  31. 31.103 × 4 =
  32. 32.16 × 4 =
  33. 33.49 × 4 =
  34. 34.40 × 8 =
  35. 35.15 × 8 =
  36. 36.54 × 8 =
  37. 37.46 × 4 =
  38. 38.75 × 8 =
  39. 39.26 × 4 =
  40. 40.91 × 4 =

Answer key

  1. 204
  2. 544
  3. 96
  4. 68
  5. 148
  6. 388
  7. 472
  8. 224
  9. 400
  10. 328
  11. 232
  12. 264
  13. 496
  14. 416
  15. 428
  16. 392
  17. 220
  18. 512
  19. 516
  20. 628
  21. 280
  22. 100
  23. 608
  24. 544
  25. 188
  26. 464
  27. 300
  28. 352
  29. 216
  30. 364
  31. 412
  32. 64
  33. 196
  34. 320
  35. 120
  36. 432
  37. 184
  38. 600
  39. 104
  40. 364

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