题目内容
(1)
+25%÷(
-1.5×
)
(2)36×(
+
-
)
(3)(0.5-
)÷0.12×
(4)
+
×(
-
)÷
(5)
×[
+(
-
)].
3 |
4 |
2 |
3 |
1 |
3 |
(2)36×(
5 |
12 |
1 |
2 |
4 |
9 |
(3)(0.5-
1 |
3 |
2 |
75 |
(4)
1 |
2 |
2 |
3 |
3 |
4 |
1 |
6 |
1 |
5 |
(5)
3 |
4 |
7 |
16 |
8 |
9 |
3 |
4 |
分析:本题据四则混合运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的;同时要注意分析式中数据,能简算的要简算.
解答:解:(1)
+25%÷(
-1.5×
)
=
+
÷(
-
×
),
=
+
÷
,
=
+
,
=
;
(2)36×(
+
-
)
=36×
+36×
-36×
,
=15+18-16,
=17;
(3)(0.5-
)÷0.12×
=(
-
)÷
×
,
=
×
×
,
=
;
(4)
+
×(
-
)÷
=
+
×
×5,
=
+
,
=
;
(5)
×[
+(
-
)]
=
×[
+
],
=
×
,
=
.
3 |
4 |
2 |
3 |
1 |
3 |
=
3 |
4 |
1 |
4 |
2 |
3 |
3 |
2 |
1 |
3 |
=
3 |
4 |
1 |
4 |
1 |
6 |
=
3 |
4 |
6 |
4 |
=
9 |
4 |
(2)36×(
5 |
12 |
1 |
2 |
4 |
9 |
=36×
5 |
12 |
1 |
2 |
4 |
9 |
=15+18-16,
=17;
(3)(0.5-
1 |
3 |
2 |
75 |
=(
1 |
2 |
1 |
3 |
3 |
25 |
2 |
75 |
=
1 |
6 |
25 |
3 |
2 |
75 |
=
1 |
27 |
(4)
1 |
2 |
2 |
3 |
3 |
4 |
1 |
6 |
1 |
5 |
=
1 |
2 |
2 |
3 |
7 |
12 |
=
1 |
2 |
35 |
18 |
=
22 |
9 |
(5)
3 |
4 |
7 |
16 |
8 |
9 |
3 |
4 |
=
3 |
4 |
7 |
16 |
5 |
36 |
=
3 |
4 |
83 |
144 |
=
83 |
192 |
点评:完成含有分数的四则混合运算要细心,注意通分、约分.
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