下面各题怎样简便怎样算.①10944÷36×25-758②132.5-18÷7.5+7.6③1.55×322-322×920④(12×56-7.3)÷94⑤35÷[78-(25+38)].-数学

题目简介

下面各题怎样简便怎样算.①10944÷36×25-758②132.5-18÷7.5+7.6③1.55×322-322×920④(12×56-7.3)÷94⑤35÷[78-(25+38)].-数学

题目详情

下面各题怎样简便怎样算.
①10944÷36×25-758
②132.5-18÷7.5+7.6
③1.55×
3
22
-
3
22
×
9
20

④(12×
5
6
-7.3)÷
9
4

3
5
÷[
7
8
-(
2
5
+
3
8
)].
题型:解答题难度:中档来源:不详

答案

①10944÷36×25-758,
=304×25-758,
=7600-758,
=6842;

②132.5-18÷7.5+7.6,
=132.5-2.4+7.6,
=137.7;

③1.55×class="stub"3
22
-class="stub"3
22
×class="stub"9
20

=class="stub"3
22
×(1.55-class="stub"9
20
),
=class="stub"3
22
×(1.55-0.45),
=class="stub"3
22
×1.1,
=class="stub"3
20


④(12×class="stub"5
6
-7.3)÷class="stub"9
4

=(10-7.3)÷class="stub"9
4

=2.7×class="stub"4
9

=1.2;

class="stub"3
5
÷[class="stub"7
8
-(class="stub"2
5
+class="stub"3
8
)],
=class="stub"3
5
÷[class="stub"7
8
-class="stub"3
8
-class="stub"2
5
],
=class="stub"3
5
÷[class="stub"1
2
-class="stub"2
5
],
=class="stub"3
5
÷class="stub"1
10

=class="stub"3
5
×10,
=6.

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