计算.34+56-71234-16-3859-13+56.-数学

题目简介

计算.34+56-71234-16-3859-13+56.-数学

题目详情

计算.
3
4
+
5
6
-
7
12
3
4
-
1
6
-
3
8
5
9
-
1
3
+
5
6
题型:解答题难度:中档来源:不详

答案

(1)class="stub"3
4
+class="stub"5
6
-class="stub"7
12

=class="stub"9
12
+class="stub"10
12
-class="stub"7
12

=class="stub"9+10-7
12

=1;

(2)class="stub"3
4
-class="stub"1
6
-class="stub"3
8

=class="stub"18
24
-class="stub"4
24
-class="stub"9
24

=class="stub"18-4-9
24

=class="stub"5
24


(3)class="stub"5
9
-class="stub"1
3
+class="stub"5
6

=class="stub"10
18
-class="stub"6
18
+class="stub"15
18

=class="stub"10-6+15
18

=class="stub"19
18

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