问题
解答题
计算 (1)[5-3
(2)[2-(8.25-5
|
答案
(1)[5-3
÷(17 8
+2.25×5 6
)]÷12.50%,1 3
=[5-3
÷(7 8
+11 6
)]×8,3 4
=[5-
×31 8
]×8,12 31
=3.5×8,
=28;
(2)[2-(8.25-5
)×1 3
]÷0.9,2 3
=[2-(8.25-5
)×1 3
]÷0.92 3
=[2-(
-99 12
)×64 12
]÷0.9,2 3
=[2-
×35 12
]×2 3
,10 9
=
×1 18
,10 9
=
.5 81