问题 解答题
能简算的要简算.
①23×
3
8
+57÷
8
3

②1.36×2.7+13.6×0.73
③0.25×1.25÷
1
32

④(
3
8
+
7
8
-
2
3
)×24
⑤[1-
7
8
÷(
5
6
+
1
2
×
1
3
)]÷
7
12

⑥2008×
1
2007
答案

①23×

3
8
+57÷
8
3

=(23+57)×

3
8

=80×

3
8

=30;

②1.36×2.7+13.6×0.73,

=1.36×2.7+1.36×7.3

=1.36×(2.7+7.3),

=1.36×10,

=13.6;

③0.25×1.25÷

1
32

=0.25×1.25×32,

=(0.25×4)×(1.25×8),

=1×10,

=10;

④(

3
8
+
7
8
-
2
3
)×24,

=

3
8
×24+
7
8
×24-
2
3
×24,

=9+21-16,

=14;

⑤[1-

7
8
÷(
5
6
+
1
2
×
1
3
)]÷
7
12

=[1-

7
8
÷1]÷
7
12

=

1
8
÷
7
12

=

3
14

⑥2008×

1
2007

=(2007+1)×

1
2007

=2007×

1
2007
+
1
2007

=1+

1
2007

=1

1
2007

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