问题 解答题
递等式计算.(能简便运算的要用简便方法计算)
14760÷36-24×11               
5.2×4.5+4.5×3.8+4.5
12.5×25×0.4×0.8               
5-(
6
7
÷
3
14
+
6
13

4.8÷16+〔1÷(5
1
10
-5.09)〕
[4.2+(5.36-1.2)÷0.26]÷20.
答案

(1)14760÷36-24×11,

=410-264,

=146;

(2)5.2×4.5+4.5×3.8+4.5,

=4.5×(5.2+3.8+1),

=4.5×10,

=45;

(3)12.5×25×0.4×0.8,

=(12.5×0.8)×(25×0.4),

=10×10,

=100;

(4)5-(

6
7
÷
3
14
+
6
13
),

=5-(4+

6
13
),

=5-4-

6
13

=1-

6
13

=

7
13

(5)4.8÷16+[1÷(5

1
10
-5.09)],

=4.8÷16+[1÷0.01],

=4.8÷16+100,

=0.3+100,

=100.3;

(6)[4.2+(5.36-1.2)÷0.26]÷20,

=[4.2+4.26÷0.26]÷20,

=[4.2+16]÷20,

=20.4÷20,

=1.02.

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