计算,能简便的用简便方法算.813÷24-124×5131721×13+8÷2117518÷[56-(38+14)]9.75-(2.75+3.38)-2.62.-数学

题目简介

计算,能简便的用简便方法算.813÷24-124×5131721×13+8÷2117518÷[56-(38+14)]9.75-(2.75+3.38)-2.62.-数学

题目详情

计算,能简便的用简便方法算.
8
13
÷24-
1
24
×
5
13
17
21
×13+8÷
21
17
5
18
÷[
5
6
-(
3
8
+
1
4
)]
9.75-(2.75+3.38)-2.62.
题型:解答题难度:中档来源:不详

答案

(1)class="stub"8
13
÷24-class="stub"1
24
×class="stub"5
13

=class="stub"8
13
×class="stub"1
24
-class="stub"1
24
×class="stub"5
13

=(class="stub"8
13
-class="stub"5
13
)×class="stub"1
24

=class="stub"3
13
×class="stub"1
24

=class="stub"1
104


(2)class="stub"17
21
×13+8÷class="stub"21
17

=class="stub"17
21
×13+8×class="stub"17
21

=class="stub"17
21
×(13+8),
=class="stub"17
21
×21,
=17;

(3)class="stub"5
18
÷[class="stub"5
6
-(class="stub"3
8
+class="stub"1
4
)],
=class="stub"5
18
÷[class="stub"5
6
-class="stub"5
8
],
=class="stub"5
18
÷class="stub"5
24

=class="stub"4
3


(4)9.75-(2.75+3.38)-2.62,
=9.75-2.75-3.38-2.62,
=(9.75-2.75)-(3.38+2.62),
=7-6,
=1.

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