212×415+13×52+25×52.-数学

题目简介

212×415+13×52+25×52.-数学

题目详情

2
1
2
×
4
15
+
1
3
×
5
2
+
2
5
×
5
2
题型:解答题难度:中档来源:不详

答案

2class="stub"1
2
×class="stub"4
15
+class="stub"1
3
×class="stub"5
2
+class="stub"2
5
×class="stub"5
2

=class="stub"5
2
×class="stub"4
15
+class="stub"1
3
×class="stub"5
2
+class="stub"2
5
×class="stub"5
2

=class="stub"5
2
×(class="stub"4
15
+class="stub"1
3
+class="stub"2
5
)

=class="stub"5
2
×1,
=class="stub"5
2

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