计算.1-27-37;12+25+13.-数学

题目简介

计算.1-27-37;12+25+13.-数学

题目详情

计算.
1-
2
7
-
3
7
1
2
+
2
5
+
1
3
题型:解答题难度:中档来源:不详

答案

(1)1-class="stub"2
7
-class="stub"3
7

=1-(class="stub"2
7
+class="stub"3
7

=1-class="stub"5
7

=class="stub"2
7


(2)class="stub"1
2
+class="stub"2
5
+class="stub"1
3

=class="stub"9
10
+class="stub"1
3

=class="stub"37
30

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