Question

[Chu Diệu Linh]

tìm số tự nhiên y biết

3\(\frac{1}{2}\) * 4,2 <y < 1,65 :\(\frac{1}{10}\)

\(\frac{22010}{100}\)< y *5 < 2,258 : 0,01

Answer 1

[luuthianhhuyen]

\(\frac{22010}{100}< y\cdot5< 2,258:0,01\)

\(\Rightarrow220,1< y.5< 225,8\)

\(\Rightarrow44,02\cdot5< y\cdot5< 45,16\cdot5\)

\(\Rightarrow44,02< y< 45,16\)

\(\Rightarrow y=45\)

Vậy\(y=45\)

Answer 2

[luuthianhhuyen]

\(3\frac{1}{2}\cdot4,2< y< 1,65:\frac{1}{10}\)

\(\Rightarrow14,7< y< 16,5\)

\(\Rightarrow y=15;16\)

Vậy \(y=15\)và\(y=16\)