4/5*37.5%+3/8*32-0.375的简算

问题描述:

4/5*37.5%+3/8*32-0.375的简算

4/5*37.5%+3/8*32-0.375
=4/5x3/8+3/8x32-3/8
=(4/5-1)x3/8+12
=12-1/5x3/8
=12-3/40
=11又 37/40