题目内容
脱式计算
÷(1-
×
)
(
-
÷
)×
12+
×(
-
)
-
÷3+
.
5 |
8 |
3 |
4 |
2 |
5 |
(
2 |
3 |
1 |
3 |
5 |
9 |
9 |
10 |
6 |
5 |
4 |
5 |
1 |
3 |
3 |
4 |
3 |
4 |
9 |
25 |
分析:有括号的要先算括号里面的,再算括号外面的,没有括号时,要先算乘除法,再算加减法.
解答:解:
÷(1-
×
)
=
×
=
;
(
-
÷
)×
=(
-
)×
=
×
=
;
12+
×(
-
)
=12+
×
=12+
=12
;
-
÷3+
=
-
+
=
+
=
.
5 |
8 |
3 |
4 |
2 |
5 |
=
5 |
8 |
10 |
7 |
=
25 |
28 |
(
2 |
3 |
1 |
3 |
5 |
9 |
9 |
10 |
=(
2 |
3 |
3 |
5 |
9 |
10 |
=
1 |
15 |
9 |
10 |
=
3 |
50 |
12+
6 |
5 |
4 |
5 |
1 |
3 |
=12+
6 |
5 |
7 |
15 |
=12+
14 |
25 |
=12
14 |
25 |
3 |
4 |
3 |
4 |
9 |
25 |
=
3 |
4 |
1 |
4 |
9 |
25 |
=
1 |
2 |
9 |
25 |
=
43 |
50 |
点评:按分数的四则混合运算的运算顺序进行计算即可.
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