问题 解答题
计算下面各题.(能简算的要用简便方法算)
60×(
2
5
+
3
4
-
1
2

1-[
1
6
+(
3
4
-
7
12
)]
5
8
×
11
10
+
3
8
÷
10
11
答案

(1)60×(

2
5
+
3
4
-
1
2

=60×

2
5
+60×
3
4
-60×
1
2

=24+45-30

=39

(2)1-[

1
6
+(
3
4
-
7
12
)]

=1-[

1
6
+
1
6
]

=1-

1
3

=

2
3

(3)

5
8
×
11
10
+
3
8
÷
10
11

=

5
8
×
11
10
+
3
8
×
11
10

=(

5
8
+
3
8
)×
11
10

=1×

11
10

=

11
10

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