问题 解答题
用你喜欢的方法计算
(1)1375+360÷90×250  
(2)81÷14+17×
1
14

(3)
3
5
×(
1
7
+
8
21
÷
2
3
)

(4)
2006
2007
×2008
答案

(1)1375+360÷90×250,

=1375+40×250,

=1375+1000,

=2375;

(2)81÷14+17×

1
14

=81×

1
14
+17×
1
14

=(81+17)×

1
14

=98×

1
14

=7;

(3)

3
5
×(
1
7
+
8
21
÷
2
3
),

=

3
5
×(
1
7
+
4
7
),

=

3
5
×
5
7

=

3
7

(4)

2006
2007
×2008,

=

2006
2007
×(2007+1),

=

2006
2007
×2007+
2006
2007
×1,

=2007+

2006
2007

=2007

2006
2007

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