0.25×19+5×14215×13×3017×34+27×18+6735×7.6+2.4×0.6.-数学

题目简介

0.25×19+5×14215×13×3017×34+27×18+6735×7.6+2.4×0.6.-数学

题目详情

0.25×19+5×
1
4

2
15
×13×30
1
7
×
3
4
+
2
7
×
1
8
+
6
7

3
5
×7.6+2.4×0.6.
题型:解答题难度:中档来源:不详

答案

(1)0.25×19+5×class="stub"1
4

=class="stub"1
4
×19+5×class="stub"1
4

=class="stub"1
4
×(19+5),
=class="stub"1
4
×24,
=6;

(2)class="stub"2
15
×13×30
=class="stub"2
15
×30×13,
=4×13,
=52;

(3)class="stub"1
7
×class="stub"3
4
+class="stub"2
7
×class="stub"1
8
+class="stub"6
7

=class="stub"1
7
×class="stub"3
4
+class="stub"1
7
×class="stub"1
4
+class="stub"6
7

=class="stub"1
7
×(class="stub"3
4
+class="stub"1
4
)+class="stub"6
7

=class="stub"1
7
+class="stub"6
7

=1;

(4)class="stub"3
5
×7.6+2.4×0.6.
=0.6×7.6+2.4×0.6,
=0.6×(7.6+2.4),
=0.6×10,
=6.

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