Question

一又十七分之四乘（二又三分之二减四分之三）+十五又十二分之一除以二十一分之十七

巧算哦~~

Answer 1

1又4/17*(2又2/3-3/4)+15又1/12/(17/21)
=21/17*(8/3-3/4)+181/12*21/17
=21/17*23/12+181/12*21/17
=21/17*(23/12+181/12)
=21/17*204/12
=7/17*51
=357/17

追问

没约分 15分之8×29 巧算

Answer 2

=21/17×(8/3-3/4)+(15+1/12)×21/17
=21/17×(23/12+15+1/12)
=21/17×17
=21

追问

15分之8×29 巧算