题目内容

计算(能简算的要简算)
1
2
-
1
7
×
7
10
+
5
6
(
2
3
-
5
9
×
3
8
16
7
7
18
×
1
4
+
3
4
×
7
18
45×
45
46
24×(
3
4
-
1
3
+
1
6
)
2-(
1
2
+
1
25
)-
23
50
(1)
1
2
-
1
7
×
7
10
+
5
6

=
1
2
-
1
10
+
5
6

=
2
5
+
5
6

=
37
30


(2)(
2
3
-
5
9
×
3
8
)×
16
7

=(
2
3
-
5
24
)×
16
7

=
11
24
×
16
7

=
22
21


(3)
7
18
×
1
4
+
3
4
×
7
18

=(
1
4
+
3
4
)×
7
18

=1×
7
18

=
7
18


(4)45×
45
46

=(46-1)×
45
46

=46×
45
46
-1×
45
46

=45-
45
46

=44
1
46


(5)24×(
3
4
-
1
3
+
1
6
),
=24×
3
4
-24×
1
3
+24×
1
6

=18-8+4,
=14;

(6)2-(
1
2
+
1
25
)-
23
50

=2-
27
50
-
23
50

=2-(
27
50
+
23
50
),
=2-1,
=1.
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