脱式运算(1)512×415+23(2)58×(45÷25)(3)36×(29+512)(4)34×113+14÷13.-数学

题目简介

脱式运算(1)512×415+23(2)58×(45÷25)(3)36×(29+512)(4)34×113+14÷13.-数学

题目详情

脱式运算
(1)
5
12
×
4
15
+
2
3

(2)
5
8
×(
4
5
÷
2
5
)

(3)36×(
2
9
+
5
12
)

(4)
3
4
×
1
13
+
1
4
÷13
题型:解答题难度:中档来源:不详

答案

(1)class="stub"5
12
×class="stub"4
15
+class="stub"2
3

=class="stub"1
9
+class="stub"2
3

=class="stub"7
9


(2)class="stub"5
8
×(class="stub"4
5
÷class="stub"2
5
),
=class="stub"5
8
×(class="stub"4
5
×class="stub"5
2
),
=class="stub"5
8
×2,
=class="stub"5
4


(3)36×(class="stub"2
9
+class="stub"5
12
),
=36×class="stub"2
9
+36×class="stub"5
12

=8+15,
=23;

(4)class="stub"3
4
×class="stub"1
13
+class="stub"1
4
÷13,
=class="stub"3
4
×class="stub"1
13
+class="stub"1
4
×class="stub"1
13

=(class="stub"3
4
+class="stub"1
4
)×class="stub"1
13

=1×class="stub"1
13

=class="stub"1
13

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