用递等式计算.360÷15-2.5×1.6815÷16-715×6(1-34×25)÷78.-数学

题目简介

用递等式计算.360÷15-2.5×1.6815÷16-715×6(1-34×25)÷78.-数学

题目详情

用递等式计算.
360÷15-2.5×1.6
8
15
÷
1
6
-
7
15
×6
(1-
3
4
×
2
5
)÷
7
8
题型:解答题难度:中档来源:不详

答案

(1)360÷15-2.5×1.6,
=24-2.5×4×0.4,
=24-10×0.4,
=24-4,
=20;

(2)class="stub"8
15
÷class="stub"1
6
-class="stub"7
15
×6,
=class="stub"8
15
×
6-class="stub"7
15
×
6
=(class="stub"8
15
-class="stub"7
15
)×6,
=class="stub"1
15
×6,
=class="stub"3
5


(3)(1-class="stub"3
4
×class="stub"2
5
)÷class="stub"7
8

=(1-class="stub"3
10
)÷class="stub"7
8

=class="stub"7
10
×class="stub"8
7

=class="stub"4
5

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