脱式计算,能简便的要简便计算.12÷34×43813÷7+17×61317×34×7×21714+34×1313+47+23+1717×4÷17×4.-数学

题目简介

脱式计算,能简便的要简便计算.12÷34×43813÷7+17×61317×34×7×21714+34×1313+47+23+1717×4÷17×4.-数学

题目详情

脱式计算,能简便的要简便计算.
12÷
3
4
×
4
3
8
13
÷7+
1
7
×
6
13
1
7
×34×7×
2
17
1
4
+
3
4
×
1
3
1
3
+
4
7
+
2
3
+
1
7
1
7
×4÷
1
7
×4.
题型:解答题难度:中档来源:不详

答案

(1)12÷class="stub"3
4
×class="stub"4
3

=12×class="stub"4
3
×class="stub"4
3

=class="stub"64
3

=21class="stub"1
3


(2)class="stub"8
13
÷7+class="stub"1
7
×class="stub"6
13

=class="stub"8
13
×class="stub"1
7
+class="stub"1
7
×class="stub"6
13

=class="stub"1
7
×(class="stub"8
13
+class="stub"6
13
),
=class="stub"1
7
×class="stub"14
13

=class="stub"2
13


(3)class="stub"1
7
×34×7×class="stub"2
17

=(class="stub"1
7
×7)×(class="stub"2
17
×34),
=1×4,
=4;

(4)class="stub"1
4
+class="stub"3
4
×class="stub"1
3

=class="stub"1
4
+class="stub"1
4

=class="stub"1
2


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

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

=1class="stub"5
7


(6)class="stub"1
7
×4÷class="stub"1
7
×4,
=class="stub"1
7
×4×7×4,
=(class="stub"1
7
×7)×(4×4),
=1×16,
=16.

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