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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 378 · 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. 1.110 × 4 =
  2. 2.70 × 8 =
  3. 3.67 × 8 =
  4. 4.69 × 8 =
  5. 5.99 × 4 =
  6. 6.126 × 4 =
  7. 7.117 × 4 =
  8. 8.101 × 4 =
  9. 9.80 × 4 =
  10. 10.54 × 8 =
  11. 11.152 × 4 =
  12. 12.29 × 8 =
  13. 13.38 × 4 =
  14. 14.29 × 8 =
  15. 15.40 × 8 =
  16. 16.68 × 4 =
  17. 17.43 × 8 =
  18. 18.82 × 4 =
  19. 19.37 × 8 =
  20. 20.61 × 8 =
  21. 21.34 × 8 =
  22. 22.105 × 4 =
  23. 23.71 × 8 =
  24. 24.15 × 8 =
  25. 25.22 × 8 =
  26. 26.28 × 4 =
  27. 27.68 × 8 =
  28. 28.30 × 8 =
  29. 29.56 × 8 =
  30. 30.32 × 8 =
  31. 31.49 × 4 =
  32. 32.61 × 4 =
  33. 33.115 × 4 =
  34. 34.16 × 8 =
  35. 35.147 × 4 =
  36. 36.19 × 4 =
  37. 37.59 × 8 =
  38. 38.152 × 4 =
  39. 39.95 × 4 =
  40. 40.48 × 4 =

Answer key

  1. 440
  2. 560
  3. 536
  4. 552
  5. 396
  6. 504
  7. 468
  8. 404
  9. 320
  10. 432
  11. 608
  12. 232
  13. 152
  14. 232
  15. 320
  16. 272
  17. 344
  18. 328
  19. 296
  20. 488
  21. 272
  22. 420
  23. 568
  24. 120
  25. 176
  26. 112
  27. 544
  28. 240
  29. 448
  30. 256
  31. 196
  32. 244
  33. 460
  34. 128
  35. 588
  36. 76
  37. 472
  38. 608
  39. 380
  40. 192

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