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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 277 · 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. 1.119 × 4 =
  2. 2.64 × 4 =
  3. 3.45 × 4 =
  4. 4.56 × 8 =
  5. 5.20 × 8 =
  6. 6.34 × 8 =
  7. 7.103 × 4 =
  8. 8.29 × 4 =
  9. 9.72 × 8 =
  10. 10.61 × 4 =
  11. 11.128 × 4 =
  12. 12.60 × 4 =
  13. 13.64 × 8 =
  14. 14.77 × 4 =
  15. 15.64 × 8 =
  16. 16.65 × 4 =
  17. 17.55 × 8 =
  18. 18.60 × 4 =
  19. 19.119 × 4 =
  20. 20.121 × 4 =
  21. 21.66 × 8 =
  22. 22.25 × 8 =
  23. 23.58 × 8 =
  24. 24.27 × 8 =
  25. 25.51 × 4 =
  26. 26.49 × 8 =
  27. 27.51 × 4 =
  28. 28.25 × 8 =
  29. 29.124 × 4 =
  30. 30.41 × 8 =
  31. 31.61 × 4 =
  32. 32.135 × 4 =
  33. 33.32 × 4 =
  34. 34.104 × 4 =
  35. 35.26 × 8 =
  36. 36.62 × 8 =
  37. 37.59 × 4 =
  38. 38.68 × 4 =
  39. 39.138 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 476
  2. 256
  3. 180
  4. 448
  5. 160
  6. 272
  7. 412
  8. 116
  9. 576
  10. 244
  11. 512
  12. 240
  13. 512
  14. 308
  15. 512
  16. 260
  17. 440
  18. 240
  19. 476
  20. 484
  21. 528
  22. 200
  23. 464
  24. 216
  25. 204
  26. 392
  27. 204
  28. 200
  29. 496
  30. 328
  31. 244
  32. 540
  33. 128
  34. 416
  35. 208
  36. 496
  37. 236
  38. 272
  39. 552
  40. 440

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