3、计算.3/4÷7/8÷15/14 (4/9+2/15)÷2/15 3/20÷ 0.2×2/3

问题描述:

3、计算.3/4÷7/8÷15/14 (4/9+2/15)÷2/15 3/20÷ 0.2×2/3

=3/4 *7/8*14/15*(4/9+2/15)*15/2*3/20*5*2/3
=3(4/9+2/15)
=26/15