题目内容

计算下面各题.
1
4
+
5
8
×
4
5
3
5
×
1
4
+
3
4
×
3
5
15×(
1
5
+
1
3
7
10
÷13+
12
13
×
7
10
1
4
+
5
8
×
4
5

=
1
4
+
1
2

=
3
4


3
5
×
1
4
+
3
4
×
3
5

=
3
5
×(
1
4
+
3
4

=
3
5
×
1
=
3
5


15×(
1
5
+
1
3

=15×
1
5
+15×
1
3

=3+5
=8;

7
10
÷13+
12
13
×
7
10

=
7
10
×(
1
13
+
12
13

=
7
10
×1
=
7
10
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