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21.99×99简便运算

2024-12-01 18:51:12

推荐回答（3个）

回答1：

图片上的算法是简便算法

回答2：

21.99×99
＝21.99X(100-1)
=21.99X100-21.99X1
=2199-21.99
= 2177.01

回答3：

=21.99×（100-1）
=21.99×100-21.99×1
=2199-21.99
=2177.01

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