来自樊宗臣的问题
17/9*5/7-(-5/7)*51/9+(-131/9)÷7/5要有过程
17/9*5/7-(-5/7)*51/9+(-131/9)÷7/5要有过程


17/9*5/7-(-5/7)*51/9+(-131/9)÷7/5要有过程
17/9*5/7-(-5/7)*51/9+(-131/9)÷7/5要有过程
17/9*5/7-(-5/7)*51/9+(-131/9)÷7/5
=17/9*5/7+5/7*51/9+(-131/9)*5/7
=[17/9+51/9+(-131/9)]*5/7
=[17/9+51/9-131/9]*5/7
=(-7)*5/7
=-5