题目内容
计算:
(1)5
+
-
×
+
÷
;
(2)
+6
-2x
.
(1)5
|
1 |
2 |
20 |
|
|
45 |
5 |
(2)
2 |
3 |
9x |
|
|
(1)原式=
+
-
+
=
+
-1+3
=2
+2;
(2)原式=2
+3
-2
=3
.
5 |
5 |
|
45÷5 |
=
5 |
5 |
=2
5 |
(2)原式=2
x |
x |
x |
=3
x |
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