题目内容

计算下列各题,能用简便方法的用简便方法计算:
(1)
9
13
×
2
3
-
1
9

(2)
3
4
×
2
7
+
1
4
×
2
7

(3)15×
7
8
÷
7
8
÷
35
(4)97×
7
10
+
7
10
+
7
10
×2
(1)
9
13
×(
2
3
-
1
9
),
=
9
13
×
2
3
-
9
13
×
1
9

=
6
13
-
1
13

=
5
13

(2)
3
4
×
2
7
+
1
4
×
2
7

=(
3
4
+
1
4
)×
2
7

=1×
2
7

=
2
7

(3)15×
7
8
÷
7
8
÷35,
=15×
7
8
×
8
7
×
1
35

=
3
7

(4)97×
7
10
+
7
10
+
7
10
×2,
=(97+l+2)×
7
10

=100×
7
10

=70;
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