(-32.57)*(-50.63)-49.37*(-32.57)简便算法
问题描述:
(-32.57)*(-50.63)-49.37*(-32.57)简便算法
快
答
(-32.57)*(-50.63)-49.37*(-32.57)
=32.57*(50.63+49.37)
=32.57*100
=3257