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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 889 · 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. 1.63 × 4 =
  2. 2.24 × 8 =
  3. 3.156 × 4 =
  4. 4.14 × 8 =
  5. 5.26 × 8 =
  6. 6.137 × 4 =
  7. 7.39 × 4 =
  8. 8.127 × 4 =
  9. 9.125 × 4 =
  10. 10.136 × 4 =
  11. 11.50 × 4 =
  12. 12.29 × 8 =
  13. 13.86 × 4 =
  14. 14.122 × 4 =
  15. 15.98 × 4 =
  16. 16.50 × 8 =
  17. 17.28 × 8 =
  18. 18.101 × 4 =
  19. 19.45 × 4 =
  20. 20.19 × 8 =
  21. 21.146 × 4 =
  22. 22.15 × 8 =
  23. 23.120 × 4 =
  24. 24.34 × 4 =
  25. 25.56 × 4 =
  26. 26.120 × 4 =
  27. 27.32 × 8 =
  28. 28.69 × 8 =
  29. 29.63 × 4 =
  30. 30.31 × 8 =
  31. 31.49 × 8 =
  32. 32.66 × 4 =
  33. 33.126 × 4 =
  34. 34.22 × 4 =
  35. 35.33 × 8 =
  36. 36.41 × 8 =
  37. 37.63 × 8 =
  38. 38.66 × 8 =
  39. 39.111 × 4 =
  40. 40.53 × 8 =

Answer key

  1. 252
  2. 192
  3. 624
  4. 112
  5. 208
  6. 548
  7. 156
  8. 508
  9. 500
  10. 544
  11. 200
  12. 232
  13. 344
  14. 488
  15. 392
  16. 400
  17. 224
  18. 404
  19. 180
  20. 152
  21. 584
  22. 120
  23. 480
  24. 136
  25. 224
  26. 480
  27. 256
  28. 552
  29. 252
  30. 248
  31. 392
  32. 264
  33. 504
  34. 88
  35. 264
  36. 328
  37. 504
  38. 528
  39. 444
  40. 424

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