5,12(423) viết thành phân số là\(\frac{56879}{11100}\)
5,12(423) = 5,12423423423... = \(\frac{511911}{99900}\)
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5,12(423)
= 5+0,12 +0,00(423)
= 5+3/25 +47/11100
=128/25 +47/11100
=56879/11100
5,12(423) = 5 + \(\frac{12423-12}{99900}\) =5 +\(\frac{12411}{99900}\) = \(\frac{55500}{11100}\) + \(\frac{1379}{11100}\) = \(\frac{56879}{11100}\)
\(5,12\left(423\right)=5+\frac{12423-12}{99900}\\ =5+\frac{12411}{99900}\\=\frac{5.99900+12411}{99900}\\ =\frac{511,911}{99900}\\ =\frac{56879}{11100}\)
5,12(423) = 5,12 + 0,00(423) = 5,12 + 1/100 . 0,(423) = 5,12 + 1/100 . 423 . 0,(001) = 5,12 + 423/100 . 1/999 = 5,12 + 47/11100 = 56879/11100
