计算下面各题,能简算的要简算.78-512+1643-(25+310)12-(34-38)5-49-5923+(12-14)25+13+35.-数学

题目简介

计算下面各题,能简算的要简算.78-512+1643-(25+310)12-(34-38)5-49-5923+(12-14)25+13+35.-数学

题目详情

计算下面各题,能简算的要简算.
7
8
-
5
12
+
1
6
4
3
-(
2
5
+
3
10
1
2
-(
3
4
-
3
8
5-
4
9
-
5
9
2
3
+(
1
2
-
1
4
2
5
+
1
3
+
3
5
题型:解答题难度:中档来源:不详

答案

(1)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"5
8


(2)class="stub"4
3
-(class="stub"2
5
+class="stub"3
10
),
=class="stub"4
3
-class="stub"7
10

=class="stub"19
10


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

=class="stub"1
8


(4)5-class="stub"4
9
-class="stub"5
9

=5-(class="stub"4
9
+class="stub"5
9
),
=5-1,
=4;

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

=class="stub"11
12


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

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

=1class="stub"1
3

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