能简算的要简算40%×23+60%×2320%×54-20%×1414×35%+0.25×65%75%×125-75%×25(23+35)×4515×40%+85×40%-数学

题目简介

能简算的要简算40%×23+60%×2320%×54-20%×1414×35%+0.25×65%75%×125-75%×25(23+35)×4515×40%+85×40%-数学

题目详情

能简算的要简算
40%×
2
3
+60%×
2
3
20%×
5
4
-20%×
1
4
1
4
×35%+0.25×65%
75%×125-75%×25
2
3
+
3
5
)×45
15×40%+85×40%
题型:解答题难度:中档来源:不详

答案

(1)40%×class="stub"2
3
+60%×class="stub"2
3

=(40%+60%)×class="stub"2
3

=1×class="stub"2
3

=class="stub"2
3


(2)20%×class="stub"5
4
-20%×class="stub"1
4

=20%×(class="stub"5
4
-class="stub"1
4
),
=20%×1,
=0.2;

(3)class="stub"1
4
×35%+0.25×65%,
=0.25×(35%+65%),
=0.25×1,
=0.25;

(4)75%×125-75%×25,
=75%×(125-25),
=0.75×100,
=75;

(5)(class="stub"2
3
+class="stub"3
5
)×45,
=class="stub"2
3
×45+class="stub"3
5
×45,
=30+27,
=57;

(6)15×40%+85×40%,
=(15+85)×0.4,
=100×0.4,
=40.

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