问题 解答题
计算下面各题,能简算的要用简便方法计算.
①73.25+
4
7
+26.75+
3
7
②12.5×2.5×32
11
27
×
1
7
+
16
27
÷7
④23.2×15+33.8÷2.6⑤(
4
5
+
1
4
)÷
7
3
+
7
10
1
4
÷(3-
5
13
-
8
13
答案

①73.25+

4
7
+26.75+
3
7

=(73.25+26.75)+(

4
7
+
3
7
),

=100+1,

=101;

②12.5×2.5×32,

=(12.5×8)×(2.5×4),

=100×10,

=1000;

11
27
×
1
7
+
16
27
÷
7,

=

11
27
×
1
7
+
16
27
×
1
7

=

1
7
×(
11
27
+
16
27
),

=

1
7
×1,

=

1
7

④23.2×15+33.8÷2.6,

=348+13,

=361;

⑤(

4
5
+
1
4
)÷
7
3
+
7
10

=(

16
20
+
5
20
)×
3
7
+
7
10

=

21
20
×
3
7
+
7
10

=

9
20
+
14
20

=

23
20

=1

3
20

1
4
÷(3-
5
13
-
8
13
),

=

1
4
÷[3-(
5
13
+
8
13
)],

=

1
4
÷[3-1],

=

1
4
×
1
2

=

1
8

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