计算(写出计算步骤):(1)34-512+156;(2)1-38÷3×23;(3)(1415-724)×32.-数学

题目简介

计算(写出计算步骤):(1)34-512+156;(2)1-38÷3×23;(3)(1415-724)×32.-数学

题目详情

计算(写出计算步骤):
(1)
3
4
-
5
12
+1
5
6
(2)1-
3
8
÷3×
2
3
(3)(
14
15
-
7
24
3
2
题型:解答题难度:中档来源:不详

答案

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

=class="stub"1
3
+1class="stub"5
6

=2class="stub"1
6


(2)1-class="stub"3
8
÷3×class="stub"2
3

=1-class="stub"1
8
×class="stub"2
3

=1-class="stub"1
12

=class="stub"11
12


(3)(class="stub"14
15
-class="stub"7
24
)×class="stub"3
2

=class="stub"14
15
×class="stub"3
2
-class="stub"7
24
×class="stub"3
2

=class="stub"7
5
-class="stub"7
16

=class="stub"77
80

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