1,5(12)=1+0,5(12)=1+\(\dfrac{512-5}{990}\)
=1+\(\dfrac{169}{330}\)=\(\dfrac{499}{330}\)
Ta có: \(0,5\left(12\right)=\dfrac{512-5}{990}=\dfrac{507}{990}=\dfrac{169}{330}\)
Do đó: \(1,5\left(12\right)=1+0,5\left(12\right)=1+\dfrac{169}{330}=\dfrac{330}{330}+\dfrac{169}{330}=\dfrac{330+169}{330}=\dfrac{499}{330}\)
Mình dùng fx 570VN PLUS nên cho kết quả luôn
\(1,5\left(12\right)=\dfrac{499}{330}\)