计算下面各题,能简便计算的要简便计算.8×0.56×12.56.25+57-2.25+27511×37+47×51113÷[(23+15)×113].-数学

题目简介

计算下面各题,能简便计算的要简便计算.8×0.56×12.56.25+57-2.25+27511×37+47×51113÷[(23+15)×113].-数学

题目详情

计算下面各题,能简便计算的要简便计算.
8×0.56×12.56.25+
5
7
-2.25+
2
7
5
11
×
3
7
+
4
7
×
5
11
1
3
÷[(
2
3
+
1
5
)×
1
13
].
题型:解答题难度:中档来源:不详

答案

(1)8×0.56×12.5,
=8×12.5×0.56,
=100×0.56,
=56;

(2)6.25+class="stub"5
7
-2.25+class="stub"2
7

=(6.25-2.25)+(class="stub"2
7
+class="stub"5
7
),
=4+1,
=5;

(3)class="stub"5
11
×class="stub"3
7
+class="stub"4
7
×class="stub"5
11

=class="stub"5
11
×(class="stub"3
7
+class="stub"4
7
),
=class="stub"5
11
×1,
=class="stub"5
11


(4)class="stub"1
3
÷[(class="stub"2
3
+class="stub"1
5
)×class="stub"1
13
],
=class="stub"1
3
÷[class="stub"13
15
×class="stub"1
13
],
=class="stub"1
3
÷class="stub"1
15

=5.

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