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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 299 · 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. 1.40 × 8 =
  2. 2.49 × 4 =
  3. 3.77 × 4 =
  4. 4.50 × 4 =
  5. 5.135 × 4 =
  6. 6.68 × 8 =
  7. 7.74 × 8 =
  8. 8.20 × 8 =
  9. 9.159 × 4 =
  10. 10.84 × 4 =
  11. 11.135 × 4 =
  12. 12.23 × 4 =
  13. 13.71 × 8 =
  14. 14.32 × 8 =
  15. 15.41 × 8 =
  16. 16.127 × 4 =
  17. 17.63 × 8 =
  18. 18.62 × 8 =
  19. 19.156 × 4 =
  20. 20.72 × 4 =
  21. 21.17 × 8 =
  22. 22.47 × 8 =
  23. 23.43 × 8 =
  24. 24.54 × 4 =
  25. 25.69 × 8 =
  26. 26.39 × 8 =
  27. 27.58 × 4 =
  28. 28.34 × 4 =
  29. 29.80 × 4 =
  30. 30.40 × 8 =
  31. 31.18 × 8 =
  32. 32.71 × 8 =
  33. 33.50 × 8 =
  34. 34.38 × 8 =
  35. 35.50 × 4 =
  36. 36.39 × 4 =
  37. 37.40 × 4 =
  38. 38.101 × 4 =
  39. 39.53 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 320
  2. 196
  3. 308
  4. 200
  5. 540
  6. 544
  7. 592
  8. 160
  9. 636
  10. 336
  11. 540
  12. 92
  13. 568
  14. 256
  15. 328
  16. 508
  17. 504
  18. 496
  19. 624
  20. 288
  21. 136
  22. 376
  23. 344
  24. 216
  25. 552
  26. 312
  27. 232
  28. 136
  29. 320
  30. 320
  31. 144
  32. 568
  33. 400
  34. 304
  35. 200
  36. 156
  37. 160
  38. 404
  39. 424
  40. 112

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