(23+14)+3427+18+38+5778-512+16.-数学

题目简介

(23+14)+3427+18+38+5778-512+16.-数学

题目详情

2
3
+
1
4
)+
3
4
    
 
2
7
+
1
8
+
3
8
+
5
7
      
 
7
8
-
5
12
+
1
6
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"2
3
+class="stub"1
4
)+class="stub"3
4

=class="stub"2
3
+(class="stub"1
4
+class="stub"3
4
),
=class="stub"2
3
+1,
=1class="stub"2
3


(2)class="stub"2
7
+class="stub"1
8
+class="stub"3
8
+class="stub"5
7

=(class="stub"2
7
+class="stub"5
7
)+(class="stub"1
8
+class="stub"3
8
),
=1+class="stub"1
2

=1class="stub"1
2


(3)class="stub"7
8
-class="stub"5
12
+class="stub"1
6

=class="stub"21
24
-class="stub"10
24
+class="stub"4
24

=class="stub"15
24

=class="stub"5
8

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