题目内容

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
(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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