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脱式计算.(能简便的要用简便方法)
(1)101×26-520÷4             
(2)3.6+
4
9
+6.4+
5
9
             
(3)4.9÷〔(5.5-0.6)×0.1〕

人气:304 ℃ 时间:2020-04-06 22:16:22
解答
(1)101×26-520÷4,
=(100+1)×26-520÷4,
=100×26+1×26-520÷4,
=2600+26-520÷4,
=2600+26-130,
=2626-130,
=2496;
(2)3.6+
4
9
+6.4+
5
9

=(3.6+6.4)+(
4
9
+
5
9
),
=10+1,
=11;
(3)4.9÷[(5.5-0.6)×0.1],
=4.9÷[4.9×0.1],
=4.9÷0.49,
=10.
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