计算下面各题.(能简算的要简算.)15+45×2716×2.5×52(12-15+512)×60.-数学

题目简介

计算下面各题.(能简算的要简算.)15+45×2716×2.5×52(12-15+512)×60.-数学

题目详情

计算下面各题.(能简算的要简算.)
1
5
+
4
5
×
2
7
16×2.5×
5
2
(
1
2
-
1
5
+
5
12
)×60
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
5
+class="stub"4
5
×class="stub"2
7

=class="stub"1
5
+class="stub"8
35

=class="stub"3
7


(2)16×2.5×class="stub"5
2

=40×class="stub"5
2

=100;

(3)(class="stub"1
2
-class="stub"1
5
+class="stub"5
12
)×60
=class="stub"1
2
×60-class="stub"1
5
×60+class="stub"5
12
×60
=30-12+25
=43.

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