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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 520 · 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. 1.89 × 4 =
  2. 2.13 × 4 =
  3. 3.56 × 8 =
  4. 4.44 × 4 =
  5. 5.35 × 8 =
  6. 6.37 × 4 =
  7. 7.28 × 8 =
  8. 8.56 × 8 =
  9. 9.48 × 8 =
  10. 10.61 × 4 =
  11. 11.152 × 4 =
  12. 12.66 × 4 =
  13. 13.75 × 8 =
  14. 14.62 × 8 =
  15. 15.114 × 4 =
  16. 16.16 × 4 =
  17. 17.56 × 8 =
  18. 18.44 × 8 =
  19. 19.82 × 4 =
  20. 20.18 × 4 =
  21. 21.142 × 4 =
  22. 22.41 × 8 =
  23. 23.44 × 8 =
  24. 24.68 × 4 =
  25. 25.36 × 8 =
  26. 26.72 × 8 =
  27. 27.49 × 8 =
  28. 28.106 × 4 =
  29. 29.13 × 4 =
  30. 30.22 × 8 =
  31. 31.53 × 4 =
  32. 32.39 × 4 =
  33. 33.74 × 4 =
  34. 34.28 × 4 =
  35. 35.117 × 4 =
  36. 36.36 × 8 =
  37. 37.32 × 8 =
  38. 38.98 × 4 =
  39. 39.68 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 356
  2. 52
  3. 448
  4. 176
  5. 280
  6. 148
  7. 224
  8. 448
  9. 384
  10. 244
  11. 608
  12. 264
  13. 600
  14. 496
  15. 456
  16. 64
  17. 448
  18. 352
  19. 328
  20. 72
  21. 568
  22. 328
  23. 352
  24. 272
  25. 288
  26. 576
  27. 392
  28. 424
  29. 52
  30. 176
  31. 212
  32. 156
  33. 296
  34. 112
  35. 468
  36. 288
  37. 256
  38. 392
  39. 272
  40. 96

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