21/44 + 2/2 =65/44
45/76 + 7/6 =\(\dfrac{401}{228}\)
\(\dfrac{21}{44}+\dfrac{2}{2}=\dfrac{21}{44}+1=\dfrac{65}{44}\)
\(\dfrac{45}{76}+\dfrac{7}{6}=\dfrac{270}{456}+\dfrac{532}{456}=\dfrac{802}{456}=\dfrac{401}{228}\)
\(\dfrac{21}{44}+\dfrac{2}{2}=\dfrac{21}{44}+\dfrac{44}{44}=\dfrac{21+44}{44}=\dfrac{65}{44}\)
\(\dfrac{45}{76}+\dfrac{7}{6}=\dfrac{135}{228}+\dfrac{266}{228}=\dfrac{135+266}{228}=\dfrac{401}{228}\)
\(\dfrac{21}{44}+\dfrac{2}{2}=\dfrac{21}{44}+1=\dfrac{65}{44}\)
\(\dfrac{65}{44}\)
\(\dfrac{401}{228}\)
Chúc bn hc tốt ^^