问题
解答题
计算.
|
答案
(1)(1-
)÷(1+3 4
)1 4
=
÷1 4 3 4
=
×1 4 4 3
=
;1 3
(2)(
-3 4
)÷(1 3
-11 15
)2 5
=
÷5 12 1 3
=
×35 12
=
;5 4
(3)2.8×
÷(5 2
×12)3 10
=7÷18 5
=7×5 18
=
;35 18
(4)18×
-16.2÷35 9
=10-5.4
=4.6.