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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 552 · 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. 1.62 × 8 =
  2. 2.57 × 8 =
  3. 3.49 × 8 =
  4. 4.118 × 4 =
  5. 5.53 × 4 =
  6. 6.113 × 4 =
  7. 7.59 × 8 =
  8. 8.70 × 8 =
  9. 9.101 × 4 =
  10. 10.38 × 4 =
  11. 11.44 × 8 =
  12. 12.57 × 8 =
  13. 13.69 × 8 =
  14. 14.52 × 4 =
  15. 15.45 × 8 =
  16. 16.101 × 4 =
  17. 17.88 × 4 =
  18. 18.23 × 8 =
  19. 19.47 × 4 =
  20. 20.63 × 8 =
  21. 21.17 × 8 =
  22. 22.80 × 4 =
  23. 23.70 × 8 =
  24. 24.59 × 8 =
  25. 25.45 × 8 =
  26. 26.41 × 4 =
  27. 27.46 × 4 =
  28. 28.25 × 8 =
  29. 29.71 × 4 =
  30. 30.16 × 8 =
  31. 31.64 × 8 =
  32. 32.69 × 8 =
  33. 33.52 × 8 =
  34. 34.41 × 4 =
  35. 35.74 × 4 =
  36. 36.45 × 8 =
  37. 37.40 × 8 =
  38. 38.55 × 8 =
  39. 39.138 × 4 =
  40. 40.94 × 4 =

Answer key

  1. 496
  2. 456
  3. 392
  4. 472
  5. 212
  6. 452
  7. 472
  8. 560
  9. 404
  10. 152
  11. 352
  12. 456
  13. 552
  14. 208
  15. 360
  16. 404
  17. 352
  18. 184
  19. 188
  20. 504
  21. 136
  22. 320
  23. 560
  24. 472
  25. 360
  26. 164
  27. 184
  28. 200
  29. 284
  30. 128
  31. 512
  32. 552
  33. 416
  34. 164
  35. 296
  36. 360
  37. 320
  38. 440
  39. 552
  40. 376

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