计算下面各题.A、212÷14×125B、329+514+434+479C、18.4-(413-134÷12)÷123D、12+16+112+120+130+142E、347×(713+147)×72

题目简介

计算下面各题.A、212÷14×125B、329+514+434+479C、18.4-(413-134÷12)÷123D、12+16+112+120+130+142E、347×(713+147)×72

题目详情

计算下面各题.
A、2
1
2
÷
1
4
×1
2
5

B、3
2
9
+5
1
4
+4
3
4
+4
7
9

C、18.4-(4
1
3
-1
3
4
÷
1
2
)÷1
2
3

D、
1
2
+
1
6
+
1
12
+
1
20
+
1
30
+
1
42

E、3
4
7
×(7
1
3
+1
4
7
7
25
÷1
1
21
题型:解答题难度:中档来源:不详

答案

A、2class="stub"1
2
÷class="stub"1
4
×1class="stub"2
5

=class="stub"5
2
×4×class="stub"7
5

=14;

B、3class="stub"2
9
+5class="stub"1
4
+4class="stub"3
4
+4class="stub"7
9

=(3class="stub"2
9
+4class="stub"7
9
)+(5class="stub"1
4
+4class="stub"3
4
),
=8+10,
=18;

C、18.4-(4class="stub"1
3
-1class="stub"3
4
÷class="stub"1
2
)÷1class="stub"2
3

=18.4-(4class="stub"1
3
-class="stub"7
2
)÷1class="stub"2
3

=18.4-class="stub"5
6
×class="stub"3
5

=18.4-0.5,
=17.9;

D、class="stub"1
2
+class="stub"1
6
+class="stub"1
12
+class="stub"1
20
+class="stub"1
30
+class="stub"1
42

=1-class="stub"1
2
+class="stub"1
2
-class="stub"1
3
+class="stub"1
3
-class="stub"1
4
+class="stub"1
4
-class="stub"1
5
+class="stub"1
5
-class="stub"1
6
+class="stub"1
6
-class="stub"1
7

=1-class="stub"1
7

=class="stub"6
7


E、3class="stub"4
7
×(7class="stub"1
3
+1class="stub"4
7
)×class="stub"7
25
÷1class="stub"1
21

=class="stub"25
7
×class="stub"7
25
×(7class="stub"1
3
+1class="stub"4
7
)×class="stub"21
22

=(7class="stub"1
3
+1class="stub"4
7
)×class="stub"21
22

=class="stub"22
3
×class="stub"21
22
+class="stub"11
7
×class="stub"21
22

=7+class="stub"3
2

=8class="stub"1
2

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