①45×8-240÷15②(2.5-2.5×0.6)÷0.4③41.2-9.5×1.8÷0.45④(14+19-112)×72⑤815÷16-715×6⑥710÷[(35-14)×12].-数学

题目简介

①45×8-240÷15②(2.5-2.5×0.6)÷0.4③41.2-9.5×1.8÷0.45④(14+19-112)×72⑤815÷16-715×6⑥710÷[(35-14)×12].-数学

题目详情

①45×8-240÷15
②(2.5-2.5×0.6)÷0.4
③41.2-9.5×1.8÷0.45
④(
1
4
+
1
9
-
1
12
)×72
8
15
÷
1
6
-
7
15
×6
7
10
÷[(
3
5
-
1
4
)×12].
题型:解答题难度:中档来源:不详

答案

①45×8-240÷15,
=360-16,
=344;

②(2.5-2.5×0.6)÷0.4,
=(2.5-1.5)÷0.4
=1÷0.4,
=2.5;

③41.2-9.5×1.8÷0.45,
=41.2-17.1÷0.45,
=41.2-38,
=3.2;

④(class="stub"1
4
+class="stub"1
9
-class="stub"1
12
)×72,
=class="stub"1
4
×72+class="stub"1
9
×72-class="stub"1
12
×72,
=18+8-6,
=26-6,
=20;

class="stub"8
15
÷class="stub"1
6
-class="stub"7
15
×6,
=class="stub"8
15
×6+class="stub"7
15
×6,
=(class="stub"8
15
+class="stub"7
15
)×6,
=1×6,
=6;

class="stub"7
10
÷[(class="stub"3
5
-class="stub"1
4
)×12],
=class="stub"7
10
÷[class="stub"7
20
×12],
=class="stub"7
10
÷class="stub"21
5

=class="stub"7
10
×class="stub"5
21

=class="stub"1
6

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