用你喜欢的方法计算下面各题.15+56+23718-(518-19)524+14+2334+49+14+292-27-3738+27+18+57.-数学

题目简介

用你喜欢的方法计算下面各题.15+56+23718-(518-19)524+14+2334+49+14+292-27-3738+27+18+57.-数学

题目详情

用你喜欢的方法计算下面各题.
1
5
+
5
6
+
2
3
        
7
18
-(
5
18
-
1
9
)    
5
24
+
1
4
+
2
3

3
4
+
4
9
+
1
4
+
2
9
       2-
2
7
-
3
7
     
3
8
+
2
7
+
1
8
+
5
7
题型:解答题难度:中档来源:不详

答案

(1)class="stub"1
5
+class="stub"5
6
+class="stub"2
3

=class="stub"1
5
+(class="stub"5
6
+class="stub"2
3
),
=class="stub"1
5
+class="stub"3
2

=class="stub"17
10


(2)class="stub"7
18
-(class="stub"5
18
-class="stub"1
9
),
=class="stub"7
18
-class="stub"5
18
+class="stub"1
9

=class="stub"1
9
+class="stub"1
9

=class="stub"2
9


(3)class="stub"5
24
+class="stub"1
4
+class="stub"2
3

=class="stub"11
24
+class="stub"16
24

=class="stub"9
8


(4)class="stub"3
4
+class="stub"4
9
+class="stub"1
4
+class="stub"2
9

=(class="stub"3
4
+class="stub"1
4
)+(class="stub"2
9
+class="stub"4
9
),
=1+class="stub"2
3

=1class="stub"2
3


(5)2-class="stub"2
7
-class="stub"3
7

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

=1class="stub"2
7


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

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

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