(1)23+35(2)113-712+920-1130+1342-1556(3)36.785-(29-3.215)(4)2009÷200920092010+12011.-数学

题目简介

(1)23+35(2)113-712+920-1130+1342-1556(3)36.785-(29-3.215)(4)2009÷200920092010+12011.-数学

题目详情

(1)
2
3
+
3
5

(2)1
1
3
-
7
12
+
9
20
-
11
30
+
13
42
-
15
56

(3)36.785-(29-3.215)
(4)2009÷2009
2009
2010
+
1
2011
题型:解答题难度:中档来源:不详

答案

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

=class="stub"10
15
+class="stub"9
15

=class="stub"19
15

=1class="stub"4
15


(2)1class="stub"1
3
-class="stub"7
12
+class="stub"9
20
-class="stub"11
30
+class="stub"13
42
-class="stub"15
56

=(class="stub"4
3
+class="stub"9
20
+class="stub"13
42
)-(class="stub"7
12
+class="stub"11
30
+class="stub"15
56
),
=(class="stub"560
420
+class="stub"189
420
+class="stub"130
420
)-(class="stub"490
840
+class="stub"308
840
+class="stub"225
840
),
=class="stub"879
420
-class="stub"1023
840

=class="stub"1758
840
-class="stub"1023
840

=class="stub"735
840

=class="stub"7
8


(3)(3)36.785-(29-3.215),
=36.785+3.215-29,
=40-29,
=11;

(4)2009÷2009class="stub"2009
2010
+class="stub"1
2011

=2009÷class="stub"2009×2010+2009
2010
+class="stub"1
2011

=2009÷class="stub"2009×2011
2010
+class="stub"1
2011

=2009×class="stub"2010
2009×2011
+class="stub"1
2011

=class="stub"2010
2011
+class="stub"1
2011

=1.

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