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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 796 · 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. 1.35 × 8 =
  2. 2.34 × 8 =
  3. 3.93 × 4 =
  4. 4.157 × 4 =
  5. 5.77 × 4 =
  6. 6.49 × 8 =
  7. 7.13 × 4 =
  8. 8.19 × 8 =
  9. 9.52 × 8 =
  10. 10.39 × 8 =
  11. 11.108 × 4 =
  12. 12.149 × 4 =
  13. 13.152 × 4 =
  14. 14.47 × 4 =
  15. 15.14 × 8 =
  16. 16.50 × 8 =
  17. 17.62 × 8 =
  18. 18.33 × 8 =
  19. 19.54 × 8 =
  20. 20.48 × 8 =
  21. 21.71 × 4 =
  22. 22.28 × 8 =
  23. 23.31 × 4 =
  24. 24.20 × 4 =
  25. 25.106 × 4 =
  26. 26.61 × 4 =
  27. 27.124 × 4 =
  28. 28.40 × 4 =
  29. 29.21 × 8 =
  30. 30.112 × 4 =
  31. 31.106 × 4 =
  32. 32.41 × 8 =
  33. 33.56 × 4 =
  34. 34.15 × 8 =
  35. 35.35 × 8 =
  36. 36.16 × 8 =
  37. 37.16 × 8 =
  38. 38.65 × 8 =
  39. 39.90 × 4 =
  40. 40.105 × 4 =

Answer key

  1. 280
  2. 272
  3. 372
  4. 628
  5. 308
  6. 392
  7. 52
  8. 152
  9. 416
  10. 312
  11. 432
  12. 596
  13. 608
  14. 188
  15. 112
  16. 400
  17. 496
  18. 264
  19. 432
  20. 384
  21. 284
  22. 224
  23. 124
  24. 80
  25. 424
  26. 244
  27. 496
  28. 160
  29. 168
  30. 448
  31. 424
  32. 328
  33. 224
  34. 120
  35. 280
  36. 128
  37. 128
  38. 520
  39. 360
  40. 420

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