7.6乘2分之1除【1.9减1.9乘(1.9减1.9)】简便计算
问题描述:
7.6乘2分之1除【1.9减1.9乘(1.9减1.9)】简便计算
答
7.6×1/2÷[1.9-1.9×(1.9-1.9)]
=3.8÷(1.9-1.9×0)
=3.8÷1.9
=2