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计算下面各题 怎样简便就怎样计算. 2-32×1021-2729×4+29×5(13+14-
问题详情
计算下面各题,怎样简便就怎样计算.
参考答案
(1)2-32×1021-27,
=2-57-27,
=2-(57+27),
=2-1,
=1;
(2)29×4+29×5,
=29×(4+5),
=29×9,
=2;
(3)(13+14-16)×24,
=13×24+14×24-16×24,
=8+6-4,
=14-4,
=10;
(4)817÷7+17×917,
=817×17+17×917,
=(817+917)×17,
=1×17,
=17;
(5)78÷(14+13),
=78÷712,
=32;
(6)[1-(14+38)]÷12,
=[1-58]÷12,
=38÷12,
=34;
(7)34×23+13÷56,
=12+25,
=910;
(8)45×34÷38,
=45×34×83,
=85;
(9)58+34÷1516+38,
=58+45+38,
=(58+38)+45,
=1+45,
=145.
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