脱式计算(能简便算的要简算).(3.8-1.8÷2)×0.5910÷[12×(65-310)]25+37+35+4719×15+15×14+17×20%-六年级数学

题目简介

脱式计算(能简便算的要简算).(3.8-1.8÷2)×0.5910÷[12×(65-310)]25+37+35+4719×15+15×14+17×20%-六年级数学

题目详情

脱式计算(能简便算的要简算).
(3.8-1.8÷2)×0.5
9
10
÷[
1
2
×(
6
5
-
3
10
)]
2
5
+
3
7
+
3
5
+
4
7

19×
1
5
+
1
5
×14+17×20%
题型:解答题难度:中档来源:不详

答案

(1)(3.8-1.8÷2)×0.5
=(3.8-0.9)×0.5,
=2.9×0.5,
=1.45;

(2)class="stub"9
10
÷[class="stub"1
2
×(class="stub"6
5
-class="stub"3
10
)]
=class="stub"9
10
÷[class="stub"1
2
×class="stub"9
10
].
=class="stub"9
10
÷class="stub"9
20

=2;

(3)class="stub"2
5
+class="stub"3
7
+class="stub"3
5
+class="stub"4
7

=(class="stub"2
5
+class="stub"3
5
)+(class="stub"3
7
+class="stub"4
7
),
=1+1,
=2;

(4)19×class="stub"1
5
+class="stub"1
5
×14+17×20%
=19×class="stub"1
5
+class="stub"1
5
×14+17×class="stub"1
5

=(19+14+17)×class="stub"1
5

=50×class="stub"1
5

=10.

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