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计算下面各题.807×99+80725×13×15×310(329+113)×13×29[1-(12-14)]×252.3×1.5+4.5÷0.751.25×(3.24-2.36)÷11.

题目详情
计算下面各题.
807×99+80725×
1
3
×
1
5
×
3
10
        
3
29
+
1
13
)×13×29
[1-(
1
2
-
1
4
)]×
2
5
          
2.3×1.5+4.5÷0.75         
1.25×(3.24-2.36)÷11.
▼优质解答
答案和解析
(1)807×99+80725×
1
3
×
1
5
×
3
10
        
=807×(100-1)+1614.5
=807×100-807×1+1614.5
=80700-807+1614.5
=81507.5
(2)(
3
29
+
1
13
)×13×29
=
3
29
×13×29+
1
13
×13×29
=39+29
=68
(3)[1-(
1
2
-
1
4
)]×
2
5
    
=[1-
1
4
2
5

=
3
4
×
2
5

=
3
10

(4)2.3×1.5+4.5÷0.75 
=3.45+6
=9.45
(5)1.25×(3.24-2.36)÷11
=1.25×0.88÷11
=1.1÷11
=0.1