计算下面各题.25+13+352342-(16+17)25+710-41597+18+38+57.-数学

题目简介

计算下面各题.25+13+352342-(16+17)25+710-41597+18+38+57.-数学

题目详情

计算下面各题.
2
5
+
1
3
+
3
5

23
42
-(
1
6
+
1
7

2
5
+
7
10
-
4
15

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

答案


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

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

=1+class="stub"1
3

=1class="stub"1
3


(2)class="stub"23
42
-(class="stub"1
6
+class="stub"1
7
),
=class="stub"23
42
-class="stub"13
42

=class="stub"5
21


(3)class="stub"2
5
+class="stub"7
10
-class="stub"4
15

=class="stub"11
10
-class="stub"4
15

=class="stub"5
6


(4)class="stub"9
7
+class="stub"1
8
+class="stub"3
8
+class="stub"5
7

=(class="stub"9
7
+class="stub"5
7
)+(class="stub"1
8
+class="stub"3
8
),
=2+class="stub"1
2

=2class="stub"1
2

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