(271+169)×23+25712÷7×2735+25-35+2512×13+12×1358×98+38×10017-17×1718.-数学

题目简介

(271+169)×23+25712÷7×2735+25-35+2512×13+12×1358×98+38×10017-17×1718.-数学

题目详情

2
71
+
1
69
)×23+
25
71
2÷7×
2
7
3
5
+
2
5
-
3
5
+
2
5
1
2
×
1
3
+
1
2
×
1
3
5
8
×98+
3
8
×100
17-17×
17
18
题型:解答题难度:中档来源:不详

答案

(1)(class="stub"2
71
+class="stub"1
69
)×23+class="stub"25
71

=class="stub"2
71
×
23+class="stub"1
69
×
23+class="stub"25
71

=(class="stub"46
71
+class="stub"25
71
+class="stub"1
3

=1+class="stub"1
3

=1class="stub"1
3

(2)2÷7×class="stub"2
7

=2×class="stub"1
7
×class="stub"2
7

=class="stub"4
49

(3)class="stub"3
5
+class="stub"2
5
-class="stub"3
5
+class="stub"2
5

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

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

=class="stub"1
2
×class="stub"1
3
×2,
=class="stub"1
3

(5)class="stub"5
8
×98+class="stub"3
8
×100,
=class="stub"5
8
×
(100-2)+class="stub"3
8
×100,
=class="stub"5
8
×
100-class="stub"5
8
×
2+class="stub"3
8
×
100,
=(class="stub"5
8
+class="stub"3
8
)×100-class="stub"5
4

=100-class="stub"5
4

=98class="stub"3
4

(6)17-17×class="stub"17
18

=(1-class="stub"17
18
)×17,
=class="stub"1
18
×
17,
=class="stub"17
18

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