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列竖式计算.(怎样简便就怎么算)(1)316+278+184+222(2)1659-488-659(3)100-100÷50(4)32×9-12×9.

题目详情
列竖式计算.(怎样简便就怎么算)
(1)316+278+184+222
(2)1659-488-659
(3)100-100÷50
(4)32×9-12×9.
▼优质解答
答案和解析
(1)316+278+184+222,
=(316+184)+(222+278),
=500+500,
=1000;

(2)1659-488-659,
=1659-659-488,
=1000-488,
=512;

(3)100-100÷50,
=100-2,
=98;

(4)32×9-12×9,
=(32-12)×9,
=20×9,
=180.