计算.2-14-13-340.8+58+0.215-712-5÷1245-(710-1320).-数学

题目简介

计算.2-14-13-340.8+58+0.215-712-5÷1245-(710-1320).-数学

题目详情

计算.
2-
1
4
-
1
3
-
3
4
0.8+
5
8
+0.2
15-
7
12
-5÷12
4
5
-(
7
10
-
13
20
)
题型:解答题难度:中档来源:不详

答案


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

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

=2-1-class="stub"1
3

=1-class="stub"1
3

=class="stub"2
3


(2)0.8+class="stub"5
8
+0.2,
=(0.8+0.2)+class="stub"5
8

=1+class="stub"5
8

=1class="stub"5
8


(3)15-class="stub"7
12
-5÷12

=15-class="stub"7
12
-class="stub"5
12

=15-(class="stub"7
12
+class="stub"5
12
),
=15-1,
=14;

(4)class="stub"4
5
-(class="stub"7
10
-class="stub"13
20
)

=class="stub"4
5
-class="stub"1
20

=class="stub"3
4

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