用5491四个数字计算24点

Question

如题所述

Answer 1

9－5×﹙1－4﹚
=9-5x(-3)
=9-(-15)
=24;

9＋﹙4－1﹚×5
=9+3x5
=9+15
=24;

﹙9－4﹚×5－1
=5x5-1
=25-1
=24;

供参考。