题目内容

脱式计算,能简算的要简算.
(六)(
5
3
-
9
)×9
(5)80×
5
79
+78×
5
79

(3)
7
9
+
5
÷
4
5
+
3
8

(4)六÷
六0
÷
六0
7
×
4
7
(1)(
v
3
-
1
9
)×9,
=
v
3
×9-
1
9
×9,
=4-1,
=4;

(v)80×
4
79
+78×
4
79

=(80+78)×
4
79

=148×
4
79

=10;

(3)
7
9
+
1
v
÷
4
4
+
3
8

=
7
9
+
4
8
+
3
8

=
7
9
+
4
8
+
3
8
),
=
7
9
+
1,
=1
7
9


(4)
1
10
÷
10
7
×
4
7

=10÷
10
7
×
4
7

=7×
4
7

=4.
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