脱式计算．（能简算的要简算）（12+13+14）×2415.8-718+14.2-1118715×25%+815÷4+141÷[（13+56）÷512]．

Question

脱式计算．（能简算的要简算）
（(1)/(2)+(1)/(3)+(1)/(4)）×24           
15.8-(7)/(18)+14.2-(11)/(18)
(7)/(15)×25%+(8)/(15)÷4+(1)/(4)
1÷[（(1)/(3)+(5)/(6)）÷(5)/(12)]．

Answer 1

（1）（(1)/(2)+(1)/(3)+(1)/(4)）×24  
=(1)/(2)×24+(1)/(3)×24+(1)/(4)×24  
=12+8+6
=26

（2）15.8-(7)/(18)+14.2-(11)/(18)
=（15.8+14.2）-（(7)/(18)+(11)/(18)）
=30-1
=29

（3）(7)/(15)×25%+(8)/(15)÷4+(1)/(4)
=(7)/(15)×(1)/(4)+(8)/(15)×(1)/(4)+(1)/(4)
=（(7)/(15)+(8)/(15)+1）×(1)/(4)
=2×(1)/(4)
=(1)/(2)

（4）1÷[（(1)/(3)+(5)/(6)）÷(5)/(12)]
=1÷[(7)/(6)÷(5)/(12)]
=1÷(14)/(5)
=(5)/(14)