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(2009•高县)计算下面各题.278+450÷18×252009-2009×0.146×2.2÷(3.3+5.9)[4-(34-38)]×429.

题目详情
(2009•高县)计算下面各题.
278+450÷18×25                           
2009-2009×0.1
46×2.2÷(3.3+5.9)
[4-(
3
4
-
3
8
)]×
4
29
▼优质解答
答案和解析
(1)278+450÷18×25,
=278+450÷9÷2×25,
=278+25×25,
=278+625,
=903;

(2)2009-2009×0.1,
=2009-200.9,
=1808.1;

(3)46×2.2÷(3.3+5.9),
=46×2.2÷9.2,
=11.

(4)[4-(
3
4
-
3
8
)]×
4
29

=[4-
3
8
4
29

=
29
8
×
4
29

=
1
2