题目内容

计算下列各题,能简算的要简算.
3
4
×
4
5
+
4
5
×
1
2
11
8
×
2
15
×
4
11
10-
4
5
÷
2
3
5
4
÷[1÷(
1
5
-
1
10
)]
(1)
3
4
×
4
5
+
4
5
×
1
2

=(
3
4
+
1
2
)×
4
5

=
5
4
×
4
5

=1;

(2)
11
8
×
2
15
×
4
11

=
11
8
×
4
11
×
2
15

=
1
2
×
2
15

=
1
15


(3)10-
4
5
÷
2
3

=10-
6
5

=8
4
5


(4)
5
4
÷[1÷(
1
5
-
1
10
)]

=
5
4
÷[1÷
1
10
],
=
5
4
÷10,
=
1
8
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