(5/8+5/6)×4/25 简便方法计算

问题描述:

(5/8+5/6)×4/25 简便方法计算

=5/8x4/25+5/6x4/25
=1/2x1/5+1/3x2/5
=1/10+2/15
=3/30+4/30
=7/30