﹣3.14×6.28×(﹣23.3)-1.57×36.4

问题描述:

﹣3.14×6.28×(﹣23.3)-1.57×36.4
简便算法

﹣3.14×6.28×(﹣23.3)-1.57×36.4
=3.14×6.28×23.3-3.14×2×9.1
=3.14×2×(3.14×23.3-9.1)
=6.28×64.062
=402.30936