脱式计算．（能简算的要简算）（13+56×49）×54；8.5×4.68+0.15×46.8；174×193+174×23-174×7；27+74×（52÷58）．

Question

脱式计算．（能简算的要简算）
（(1)/(3)+(5)/(6)×(4)/(9)）×54；                       8.5×4.68+0.15×46.8；
(17)/(4)×(19)/(3)+(17)/(4)×(2)/(3)-(17)/(4)×7；                   (2)/(7)+(7)/(4)×（(5)/(2)÷(5)/(8)）．

Answer 1

（1）（(1)/(3)+(5)/(6)×(4)/(9)）×54
=(1)/(3)×54+(5)/(6)×(4)/(9)×54
=18+20
=38；

（2）8.5×4.68+0.15×46.8
=8.5×4.68+1.5×4.68
=（8.5+1.5）×4.68
=10×4.68
=46.8；

（3）(17)/(4)×(19)/(3)+(17)/(4)×(2)/(3)-(17)/(4)×7
=(17)/(4)×（(19)/(3)+(2)/(3)-7）
=(17)/(4)×0
=0；

（4）(2)/(7)+(7)/(4)×（(5)/(2)÷(5)/(8)）
=(2)/(7)+(7)/(4)×4
=(2)/(7)+7
=7(2)/(7)．