54.2-(2/9)+4.8-(16/9) = 57 简便计算!

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54.2-(2/9)+4.8-(16/9) = 57 简便计算!
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54.2-(2/9)+4.8-(16/9) = 57 简便计算!
54.2-(2/9)+4.8-(16/9) = 57 简便计算!

54.2-(2/9)+4.8-(16/9) = 57 简便计算!
54.2-(2/9)+4.8-(16/9)
=(54.2+4.8)-(2/9+16/9)
=59-18/9
=59-2
= 57

╮(╯﹏╰)╭。。。

54.2-(2/9)+4.8-(16/9)
=﹙54.2+4.8﹚-﹙2/9+16/9﹚
=59-18/9
=59-2
=57
﹙希望能帮到您!﹚

54.2-(2/9)+4.8-(16/9)
=542/10-2/9+48/10-16/9
=542/10+48/10-2/9-16/9
=590/10-(2/9+16/9)
=59-2
=57