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(2014•孝感模拟)下面各题怎样简便就怎样算49+59-0.625-0.3752536×56+1136÷65(115+125)×1534×87+12×75%+0.75

题目详情
(2014•孝感模拟)
下面各题怎样简便就怎样算
4
9
+
5
9
-0.625-0.375                  
25
36
×
5
6
+
11
36
÷
6
5
1
15
+
1
25
)×15                     
3
4
×87+12×75%+0.75
▼优质解答
答案和解析
(1)
4
9
+
5
9
-0.625-0.375                 
=1-(0.625+0.375)
=1-1
=0

(2)
25
36
×
5
6
+
11
36
÷
6
5

=
25
36
×
5
6
+
11
36
×
5
6

=(
25
36
+
11
36
)×
5
6

=1×
5
6

=
5
6


(3)(
1
15
+
1
25
)×15 
=
1
15
×15+
1
25
×15
=1+
3
5

=1
3
5


(4)
3
4
×87+12×75%+0.75
=0.75×87+12×0.75+0.75
=(87+12+1)×0.75
=100×0.75
=75