98.6×[3/4÷(5/6－7/12)] 简便算法

分类: 作业答案 • 2021-12-29 16:25:47

问题描述：

答

98.6×[3/4÷(5/6－7/12)]
=98.6×[3/4÷3/12]
=98.6×(3/4×4）
=(100-1.4)×3
=100×3-1.4×3
=300-4.2
=295.8