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(2014•绵阳模拟)怎样算简便就怎样算.(1)57.5-14.25-1534(2)1.25×35×0.8(3)845÷[7.8+14×(2.75+1.25)](4)411×87.5+12.5×411-4÷11.
题目详情
(2014•绵阳模拟)怎样算简便就怎样算.
(1)57.5-14.25-15
(2)1.25×
×0.8
(3)8
÷[7.8+
×(2.75+1.25)]
(4)
×87.5+12.5×
-4÷11.
(1)57.5-14.25-15
3 |
4 |
(2)1.25×
3 |
5 |
(3)8
4 |
5 |
1 |
4 |
(4)
4 |
11 |
4 |
11 |
▼优质解答
答案和解析
(1)57.5-14.25-15
=57.5-(14.25+15.75)
=57.5-30
=27.5
(2)1.25×
×0.8
=1.25×0.8×0.6
=1×0.6
=0.6
(3)8
÷[7.8+
×(2.75+1.25)]
=8
÷[7.8+
×4]
=8.8÷8.8
=1
(4)
×87.5+12.5×
-4÷11
=
×87.5+12.5×
-
=
×(87.5+12.5-1)
=
×99
=36
3 |
4 |
=57.5-(14.25+15.75)
=57.5-30
=27.5
(2)1.25×
3 |
5 |
=1.25×0.8×0.6
=1×0.6
=0.6
(3)8
4 |
5 |
1 |
4 |
=8
4 |
5 |
1 |
4 |
=8.8÷8.8
=1
(4)
4 |
11 |
4 |
11 |
=
4 |
11 |
4 |
11 |
4 |
11 |
=
4 |
11 |
=
4 |
11 |
=36
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