问题 解答题
怎样算简便就怎样算:
2008×
2006
2007

72.5+12.5+12.5÷
1
6

[(
8
9
+1
1
3
)×
3
4
-0.25]÷
1
12

(6×12.5+12.5×5)×
5
33
÷
1
8
答案

(1)2008×

2006
2007

=(2007+1)×

2006
2007

=2007×

2006
2007
+
2006
2007

=2006+

2006
2007

=2006

2006
2007

(2)72.5+12.5+12.5÷

1
6

=72.5+12.5+75,

=160;

(3)[(

8
9
+1
1
3
)×
3
4
-0.25]÷
1
12

=[

8
9
×
3
4
+
4
3
×
3
4
-
1
4
1
12

=[

2
3
+1-
1
4
1
12

=

2
3
×12+12-
1
4
×12,

=8+12-3,

=17,

(4)(6×12.5+12.5×5)×

5
33
÷
1
8

=[12.5×(6+5)]×

5
33
÷
1
8

=

25
2
×11×
5
33
×8,

=

500
3
(166
2
3
).

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