1-56+712-9⋅20+1130-1342+1556.-数学

题目简介

1-56+712-9⋅20+1130-1342+1556.-数学

题目详情

1-
5
6
+
7
12
-
9⋅
20
+
11
30
-
13
42
+
15
56
题型:解答题难度:中档来源:不详

答案

1-class="stub"5
6
+class="stub"7
12
-class="stub"9⋅
20
+class="stub"11
30
-class="stub"13
42
+class="stub"15
56

=1-(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
)+(class="stub"1
7
+class="stub"1
8

=1-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
+class="stub"1
7
+class="stub"1
8

=1-class="stub"1
2
+class="stub"1
8

=class="stub"1
2
+class="stub"1
8

=class="stub"5
8

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