递等式计算.(能简算的要简算)2÷425÷51219÷115+3×51110÷[2×(56-12)].-数学

题目简介

递等式计算.(能简算的要简算)2÷425÷51219÷115+3×51110÷[2×(56-12)].-数学

题目详情

递等式计算.(能简算的要简算)
4
25
÷
5
12

19÷
11
5
+3×
5
11

10÷[2×(
5
6
-
1
2
)].
题型:解答题难度:中档来源:不详

答案

(1)2÷class="stub"4
25
÷class="stub"5
12

=2÷(class="stub"4
25
×class="stub"5
12
),
=2÷class="stub"1
15

=30;

(2)19÷class="stub"11
5
+3×class="stub"5
11

=(19+3)×class="stub"5
11

=22×class="stub"5
11

=10;

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

=15.

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