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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 77 · 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. 1.80 × 4 =
  2. 2.61 × 4 =
  3. 3.78 × 4 =
  4. 4.21 × 8 =
  5. 5.92 × 4 =
  6. 6.14 × 8 =
  7. 7.132 × 4 =
  8. 8.44 × 4 =
  9. 9.92 × 4 =
  10. 10.25 × 4 =
  11. 11.24 × 4 =
  12. 12.128 × 4 =
  13. 13.122 × 4 =
  14. 14.26 × 8 =
  15. 15.67 × 4 =
  16. 16.79 × 4 =
  17. 17.69 × 8 =
  18. 18.61 × 8 =
  19. 19.85 × 4 =
  20. 20.107 × 4 =
  21. 21.23 × 8 =
  22. 22.51 × 4 =
  23. 23.65 × 8 =
  24. 24.73 × 8 =
  25. 25.46 × 4 =
  26. 26.39 × 8 =
  27. 27.32 × 8 =
  28. 28.137 × 4 =
  29. 29.43 × 8 =
  30. 30.61 × 8 =
  31. 31.123 × 4 =
  32. 32.26 × 8 =
  33. 33.109 × 4 =
  34. 34.48 × 8 =
  35. 35.115 × 4 =
  36. 36.27 × 4 =
  37. 37.84 × 4 =
  38. 38.72 × 8 =
  39. 39.24 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 320
  2. 244
  3. 312
  4. 168
  5. 368
  6. 112
  7. 528
  8. 176
  9. 368
  10. 100
  11. 96
  12. 512
  13. 488
  14. 208
  15. 268
  16. 316
  17. 552
  18. 488
  19. 340
  20. 428
  21. 184
  22. 204
  23. 520
  24. 584
  25. 184
  26. 312
  27. 256
  28. 548
  29. 344
  30. 488
  31. 492
  32. 208
  33. 436
  34. 384
  35. 460
  36. 108
  37. 336
  38. 576
  39. 96
  40. 200

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