Question

19分之5*14分之9+19分之7*2分之1简便运算

Answer 1

19分之5*14分之9+19分之7*2分之1
=5/19*9/14+7/19*1/2
=(5*9)/(19*14)+7/(19*2)
=45/(19*14)+49/(19*7*2)
=94/(19*7*2)
=47/(19*7)
=47/133