5/1x9/2+9/7除以5有简便方法

问题描述:

5/1x9/2+9/7除以5有简便方法

(2/9 * 4/7 + 7/9)/(7/4) = (2/9 * 4/7)/(7/4) + (7/9)/(7/4) = 32/441 + 4/9 = 76/141 2 (1/10 + 3/4)/(5/6 )