\(\dfrac{1}{6}+\dfrac{3}{6}=\dfrac{4}{6}=\dfrac{2}{3}\)
\(\dfrac{3}{50}-\dfrac{6}{3}=\dfrac{3}{50}-2=\dfrac{3}{50}-\dfrac{100}{50}=-\dfrac{97}{50}\)
Đúng 4
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`1/6+3/6=4/6=2/3`
`3/50-6/3=9/150-300/150=-291/150=-97/50`
Đúng 3
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