计算.229-(29+512)15+38+4589-23+13.-数学

题目简介

计算.229-(29+512)15+38+4589-23+13.-数学

题目详情

计算.
2
2
9
-(
2
9
+
5
12
1
5
+
3
8
+
4
5
8
9
-
2
3
+
1
3
题型:解答题难度:中档来源:不详

答案

(1)2class="stub"2
9
-(class="stub"2
9
+class="stub"5
12
),
=2class="stub"2
9
-class="stub"2
9
-class="stub"5
12

=2-class="stub"5
12

=1class="stub"7
12


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

=class="stub"1
5
+class="stub"4
5
+class="stub"3
8

=1+class="stub"3
8

=1class="stub"3
8


(3)class="stub"8
9
-class="stub"2
3
+class="stub"1
3

=class="stub"8
9
-(class="stub"2
3
-class="stub"1
3
),
=class="stub"8
9
-class="stub"1
3

=class="stub"5
9

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