题目内容
(2012?广州模拟)48×0.2×(
-
)
18
÷6+1
×6
(8.8-23.4×
)÷
2
÷{(
-
)×1.2+
}.
3 |
10 |
1 |
5 |
18
3 |
4 |
7 |
24 |
(8.8-23.4×
1 |
3 |
5 |
9 |
2
1 |
4 |
5 |
6 |
1 |
3 |
4 |
5 |
分析:本题根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:(1)48×0.2×(
-
),
=9.6×0.1,
=0.96;
(2)18
÷6+1
×6
=
+
,
=
;
(3)(8.8-23.4×
)÷
=(8.8-7.8)×
,
=1×
,
=
;
(4)2
÷[(
-
)×1.2+
]
=
÷[
×
+
],
=
÷[
+
],
=
×
,
=
.
3 |
10 |
1 |
5 |
=9.6×0.1,
=0.96;
(2)18
3 |
4 |
7 |
24 |
=
75 |
24 |
31 |
4 |
=
261 |
24 |
(3)(8.8-23.4×
1 |
3 |
5 |
9 |
=(8.8-7.8)×
9 |
5 |
=1×
9 |
5 |
=
9 |
5 |
(4)2
1 |
4 |
5 |
6 |
1 |
3 |
4 |
5 |
=
9 |
4 |
1 |
2 |
6 |
5 |
4 |
5 |
=
9 |
4 |
3 |
5 |
4 |
5 |
=
9 |
4 |
5 |
7 |
=
45 |
28 |
点评:由于本题中的算式不能进行简便计算,且式中数据较为复杂,所以计算时要细心,注意通分约分.
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