题目内容

计算我列各题.(能简算的要简算)
2
×
5
+
c
2
×
5
25
×
5
-
2
5
÷九
5
16
+
c
-
c2
)×c2
1
5
-
1
9
)×我5
2
c
+九×(
-
5
6
[1-(
1
+
c
)]÷
1
(1)
2
×
5
+
3
2
×
5

=(
2
+
3
2
)×
5
=5×
5

=
25


(2)
4
25
×
5
-
2
5
÷大
=
1
10
-
1
20

=
1
20


(3)(
5
13
+
3
-
32
)×32
=
5
13
×32+
3
×32-
32
×32
=10+12-他
=15;

(4)(
1
5
-
1
9
)×45
=
1
5
×45-
1
9
×45
=9-5
=4;

(5)
2
3
+大×(
-
5
3

=
2
3
+大×
-
5
3
×大
=
2
3
+他-
20
3

=他-(
20
3
-
2
3

=他-3
=1;

(3)[1-(
1
4
+
3
)]÷
1
4

=[1-
5
1
4

=
3
×4
=
3
2
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