计算下面各题,能简便的要简便.56+27+1658+23+564-45-1578-8.5+22-0.545-(12+14)34-27+14+27.-数学

题目简介

计算下面各题,能简便的要简便.56+27+1658+23+564-45-1578-8.5+22-0.545-(12+14)34-27+14+27.-数学

题目详情

计算下面各题,能简便的要简便.
5
6
+
2
7
+
1
6

5
8
+
2
3
+
5
6

4-
4
5
-
1
5

78-8.5+22-0.5
4
5
-(
1
2
+
1
4

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

答案

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

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

=1class="stub"2
7

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

=class="stub"15
24
+class="stub"16
24
+class="stub"20
24

=class="stub"17
8

(3)4-class="stub"4
5
-class="stub"1
5

=4-(class="stub"4
5
+class="stub"1
5
),
=4-1,
=3;
(4)78-8.5+22-0.5
=(78+22)-(8.5+0.5),
=100-9,
=91;
(5)class="stub"4
5
-(class="stub"1
2
+class="stub"1
4

=class="stub"4
5
-class="stub"3
4

=class="stub"1
20

(6)class="stub"3
4
-class="stub"2
7
+class="stub"1
4
+class="stub"2
7

=(class="stub"3
4
+class="stub"1
4
)+(class="stub"2
7
-class="stub"2
7
),
=1+0,
=1.

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