脱式计算.(能简算的要简算.)27÷49+57÷49120.8×2.75-0.8×2.7532×310+1÷125%63×(27-172)-0.125.-数学

题目简介

脱式计算.(能简算的要简算.)27÷49+57÷49120.8×2.75-0.8×2.7532×310+1÷125%63×(27-172)-0.125.-数学

题目详情

脱式计算.(能简算的要简算.)
2
7
÷
4
9
+
5
7
÷
4
9
120.8×2.75-0.8×2.75
32×
3
10
+1÷125%
63×(
2
7
-
1
72
)-0.125.
题型:解答题难度:中档来源:不详

答案

class="stub"2
7
÷class="stub"4
9
+class="stub"5
7
÷class="stub"4
9

=class="stub"2
7
×class="stub"9
4
+class="stub"5
7
×class="stub"9
4

=(class="stub"2
7
+class="stub"5
7
)×class="stub"9
4

=class="stub"9
4


②120.8×2.75-0.8×2.75,
=2.75×(120.8-0.8),
=2.75×120,
=330;

③32×class="stub"3
10
+1÷125%,
=9.6+0.8,
=10.4;

④63×(class="stub"2
7
-class="stub"1
72
)-0.125,
=63×class="stub"2
7
-63×class="stub"1
72
-class="stub"1
8

=18-(class="stub"7
8
+class="stub"1
8
),
=18-1,
=17.

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