递等式计算.(1)56×0.25+14×16(2)25×13×25×310(3)3÷12-14×310(4)35÷[(15+13)÷89].-数学

题目简介

递等式计算.(1)56×0.25+14×16(2)25×13×25×310(3)3÷12-14×310(4)35÷[(15+13)÷89].-数学

题目详情

递等式计算.
(1)
5
6
×0.25+
1
4
×
1
6

(2)25×
1
3
×
2
5
×
3
10

(3)3÷
1
2
-
1
4
×
3
10

(4)
3
5
÷[(
1
5
+
1
3
)÷
8
9
].
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
6
×0.25+class="stub"1
4
×class="stub"1
6

=class="stub"5
6
×class="stub"1
4
+class="stub"1
4
×class="stub"1
6

=(class="stub"5
6
+class="stub"1
6
)×class="stub"1
4

=1×class="stub"1
4

=class="stub"1
4


(2)25×class="stub"1
3
×class="stub"2
5
×class="stub"3
10

=(25×class="stub"2
5
)×(class="stub"1
3
×class="stub"3
10
),
=10×class="stub"1
10

=1;

(3)3÷class="stub"1
2
-class="stub"1
4
×class="stub"3
10

=6-class="stub"1
4
×class="stub"3
10

=6-class="stub"3
40

=5class="stub"37
40


(4)class="stub"3
5
÷[(class="stub"1
5
+class="stub"1
3
)÷class="stub"8
9
],
=class="stub"3
5
÷[class="stub"8
15
÷class="stub"8
9
],
=class="stub"3
5
÷class="stub"3
5

=1.

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