脱式计算:(1)205×28-3930(2)711×(23+47)(3)(56-34)÷(14+16)(4)34×[13÷(13-14)].-数学

题目简介

脱式计算:(1)205×28-3930(2)711×(23+47)(3)(56-34)÷(14+16)(4)34×[13÷(13-14)].-数学

题目详情

脱式计算:
(1)205×28-3930(2)
7
11
×(
2
3
+
4
7
(3)(
5
6
-
3
4
)÷(
1
4
+
1
6
(4)
3
4
×[
1
3
÷(
1
3
-
1
4
)].
题型:解答题难度:中档来源:不详

答案

(1)205×28-3930,
=5740-3930,
=1810;

(2)class="stub"7
11
×(class="stub"2
3
+class="stub"4
7
),
=class="stub"7
11
×class="stub"2
3
+class="stub"7
11
×class="stub"4
7
),
=class="stub"14
33
+class="stub"4
11

=class="stub"26
33


(3)(class="stub"5
6
-class="stub"3
4
)÷(class="stub"1
4
+class="stub"1
6
),
=class="stub"1
12
÷class="stub"5
12

=class="stub"1
5


(4)class="stub"3
4
×[class="stub"1
3
÷(class="stub"1
3
-class="stub"1
4
)],
=class="stub"3
4
×[class="stub"1
3
÷class="stub"1
12
],
=class="stub"3
4
×4,
=3.

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