计算:(要求写出主要计算过程) (1)[2÷(5.4-3
(2)[(10.75-4
|
(1)[2÷(5.4-3
)×11 4
]÷34 3
,8 9
=[2÷(
-27 5
)×13 4
]×7 3
,9 35
=[2÷(
-108 20
)×65 20
]×7 3
,9 35
=[2÷
×43 20
]×7 3
,9 35
=2×
×20 43
×7 3
,9 35
=(2×
)×(20 43
×7 3
),9 35
=
×40 43
,3 5
=
;24 43
(2)[(10.75-4
)×211 12
]÷[(1.125+7 11
)÷(2.25÷101 12
)],10 11
=[(10
-49 12
)×11 12
]÷[(29 11
+9 8
)÷(1 12
÷9 4
)],120 11
=[
×35 6
]÷[29 11
÷29 24
],480 99
=
×35 6
÷[29 11
×29 24
],99 480
=
×35 6
÷29 11
÷29 24
,99 480
=
×35 6
×29 11
×24 29
,99 480
=
,21 8
=2
.5 8