脱式计算,能简算的要简算.46×8-120÷15[6.85-(0.65+0.7)]÷2.5712÷9+19×5125.58-35+5.42-25.-数学

题目简介

脱式计算,能简算的要简算.46×8-120÷15[6.85-(0.65+0.7)]÷2.5712÷9+19×5125.58-35+5.42-25.-数学

题目详情

脱式计算,能简算的要简算.
46×8-120÷15[6.85-(0.65+0.7)]÷2.5
7
12
÷9+
1
9
×
5
12
5.58-
3
5
+5.42-
2
5
题型:解答题难度:中档来源:不详

答案

(1)46×8-120÷15,
=368-8,
=360;

(2)[6.85-(0.65+0.7)]÷2.5,
=[6.85-0.65-0.7]÷2.5,
=[6.2-0.7]÷2.5,
=5.5÷2.5,
=2.2;

(3)class="stub"7
12
÷9+class="stub"1
9
×class="stub"5
12

=class="stub"7
12
×class="stub"1
9
+class="stub"1
9
×class="stub"5
12

=(class="stub"7
12
+class="stub"5
12
)×class="stub"1
9

=1×class="stub"1
9

=class="stub"1
9


(4)5.58-class="stub"3
5
+5.42-class="stub"2
5

=(5.58+5.42)-(class="stub"3
5
+class="stub"2
5
),
=11-1,
=10.

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