\(\frac{1}{15};\frac{-2}{5};-6\)
\(MSC=15\)
\(\frac{-2}{5}=\frac{-2\cdot3}{5\cdot3}=\frac{-6}{15}\)
\(-6=\frac{-6}{1}=\frac{-6\cdot15}{1\cdot15}=\frac{-90}{15}\)
Giữ nguyên phân số \(\frac{1}{15}\).
\(\dfrac{1}{15}\); \(\dfrac{-2}{5}\) và -6
Ta có: -6=\(\dfrac{-6}{1}\)
15=3.5
5=5
1=1
MC = 1. 3. 5= 15
\(\dfrac{-2}{5}\)= \(\dfrac{-2.3}{5.3}=\dfrac{-6}{15}\)
\(\dfrac{-6}{1}=\dfrac{-6.15}{1.15}=\dfrac{-90}{15}\)
\(\dfrac{1}{15}\) ta giữ nguyên.