题目内容

用合理的方法计算.
5
9
×
3
7
÷
5
9
×
3
7
1
6
7
-
6
7
×
6
7
(
5
9
+
4
7
)
×9×7
18+8÷9×
7
9
28÷14×
9
28
69÷(
23
10
+
69
70
)

(1)
5
9
×
3
7
÷
5
9
×
3
7

=(
5
9
÷
5
9
)×(
3
7
×
3
7
),
=1×
9
49

=
9
49


(2)1
6
7
-
6
7
×
6
7

=1+
6
7
-
6
7
×
6
7

=1+
6
7
×(1-
6
7
),
=1+
6
7
×
1
7

=1+
6
49

=1
6
49


(3)(
5
9
+
4
7
)
×9×7,
=
5
9
×9×7+
4
7
×9×7,
=35+36,
=71;

(4)18+8÷9×
7
9

=18+
8
9
×
7
9

=18+
56
81

=18
56
81


(5)28÷14×
9
28

=28×
9
28
÷14,
=9÷14,
=
9
14


(6)69÷(
23
10
+
69
70
)

=69÷
23
7

=21.
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