括号-8×括号-7.2括号乘12.5×5/12等于多少

括号-8×括号-7.2括号乘12.5×5/12等于多少

第1个回答  2017-09-19
(-8)x(-7.2)x12.5x5/12
=8x7.2x12.5x5/12
=(8x12.5)x(7.2x5/12)
=100x3
=300本回答被网友采纳