问题
解答题
计算: (1)(6
(2)[75%-(4
|
答案
(1)(6
-55 11
)÷[211 15
+(12-82 7
)÷1.4],2 3
=
÷[2119 165
+32 7
÷1.4],1 3
=
÷[2119 165
+2 7
],50 21
=
÷119 165
,98 21
=
;17 110
(2)[75%-(4
-32 3
)×0.25]÷[(24 9
+15 6
)÷21 3
-11 2
].4 15
=[75%-1
×0.25]÷[42 9
÷21 6
-11 2
],4 15
=[75%-
]÷[11 36
-15 3
],4 15
=
÷4 9
,2 5
=1
.1 9