脱式计算.①2700×(506-499)÷900;②33.02-(148.4-90.85)÷2.5;③(1÷27+27÷1)÷5.1;④(1.6×58+3.6÷34)×429.-数学

题目简介

脱式计算.①2700×(506-499)÷900;②33.02-(148.4-90.85)÷2.5;③(1÷27+27÷1)÷5.1;④(1.6×58+3.6÷34)×429.-数学

题目详情

脱式计算.
①2700×(506-499)÷900;
②33.02-(148.4-90.85)÷2.5;
③(1÷
2
7
+
2
7
÷1)÷5.1;
④(1.6×
5
8
+3.6÷
3
4
)×
4
29
题型:解答题难度:中档来源:不详

答案

①2700×(506-499)÷900
=2700÷900×7,
=3×7,
=21;

②33.02-(148.4-90.85)÷2.5
=33.02-57.55÷2.5,
=33.02-23.02,
=10;

③(1÷class="stub"2
7
+class="stub"2
7
÷1)÷5.1
=(class="stub"7
2
+class="stub"2
7
)×class="stub"10
51

=class="stub"53
14
×class="stub"10
51

=class="stub"265
357

④(1.6×class="stub"5
8
+3.6÷class="stub"3
4
)×class="stub"4
29

=(class="stub"8
5
×class="stub"5
8
+class="stub"18
5
×class="stub"4
3
)×class="stub"4
29

=(1+class="stub"24
5
)×class="stub"4
29

=class="stub"29
5
×class="stub"4
29

=class="stub"4
5

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