题目内容

计算下面各题,能简便计算的请简便计算.
5
12
+
5
8
)÷
5
8
+
1
3

6.5×0.64-6.5×0.54+6.5×90%
4
7
+
1
5
-
3
7
+
4
5
=
(1)(
5
12
+
5
8
)÷
5
8
+
1
3

=
25
24
×
8
5
+
1
3

=
5
3
+
1
3

=2;

(2)6.5×0.64-6.5×0.54+6.5×90%,
=6.5×0.64-6.5×0.54+6.5×0.9,
=6.5×(0.64-0.54+0.9),
=6.5×1,
=6.5;

(3)
4
7
+
1
5
-
3
7
+
4
5

=(
4
7
-
3
7
)+(
1
5
+
4
5
),
=
1
7
+1,
=1
1
7
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