脱式计算:(1)(34+56-23)×24(2)(56+712+38)÷148(3)(13-16)×(58÷16)(4)49÷[45-(13-15)].-数学

题目简介

脱式计算:(1)(34+56-23)×24(2)(56+712+38)÷148(3)(13-16)×(58÷16)(4)49÷[45-(13-15)].-数学

题目详情

脱式计算:
(1)(
3
4
+
5
6
-
2
3
)×24
(2)(
5
6
+
7
12
+
3
8
)÷
1
48

(3)(
1
3
-
1
6
)×(
5
8
÷
1
6

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

答案

(1)(class="stub"3
4
+class="stub"5
6
-class="stub"2
3
)×24
=class="stub"3
4
×
24+class="stub"5
6
×
24-class="stub"2
3
×
24,
=18+20-16,
=22;

(2)(class="stub"5
6
+class="stub"7
12
+class="stub"3
8
)÷class="stub"1
48

=(class="stub"5
6
+class="stub"7
12
+class="stub"3
8
)×48,
=class="stub"5
6
×
48+class="stub"7
12
×48+class="stub"3
8
×48,
=40+28+18,
=86;

(3)(class="stub"1
3
-class="stub"1
6
)×(class="stub"5
8
÷class="stub"1
6

=(class="stub"2
6
-class="stub"1
6
)×(class="stub"5
8
×6
),
=class="stub"1
6
×class="stub"15
4

=class="stub"5
8


(4)class="stub"4
9
÷[class="stub"4
5
-(class="stub"1
3
-class="stub"1
5
)]
=class="stub"4
9
÷[class="stub"4
5
-
class="stub"5
15
-class="stub"3
15
)],
=class="stub"4
9
÷[class="stub"4
5
-class="stub"2
15
],
=class="stub"4
9
÷[class="stub"12
15
-class="stub"2
15
],
=class="stub"4
9
×class="stub"3
2

=class="stub"2
3

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