
计算下面各题.278+450÷18×25 &nb...
计算下面各题.278+450÷18×252009-2009×0.146×2.2÷(3.3+5.9)[4-(34-38)]×429....
计算下面各题.278+450÷18×25 2009-2009×0.146×2.2÷(3.3+5.9)[4-(34-38)]×429.
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(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-(
-
)]×
,
=[4-
]×
,
=
×
,
=
.
=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 |
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