Răspuns: Ai rezolvarea mai jos pentru fiecare subpunct
Explicație pas cu pas:
（*＾-＾*）Salutare!
[tex]\bf a)~\dfrac{5}{7}+2\dfrac{3}{7}=\dfrac{5}{7}+\dfrac{2\cdot7 +3}{7}=\dfrac{5}{7}+\dfrac{17}{7}=\dfrac{5+17}{7}=\boxed{\bf \dfrac{22}{7}}[/tex]
[tex]\it~~[/tex]
[tex]\bf b)~3\dfrac{2}{9}+\dfrac{5}{9}=\dfrac{3\cdot9 +2}{9}+\dfrac{5}{9}=\dfrac{29}{9}+\dfrac{5}{9}=\boxed{\bf \dfrac{24}{9}}[/tex]
[tex]\it~~~[/tex][tex]\bf c)~5\dfrac{1}{7}+3\dfrac{4}{7}=\dfrac{5\cdot7+1}{7}+\dfrac{3\cdot7 +4}{7}=\dfrac{36}{7}+\dfrac{25}{7}=\dfrac{36+25}{7}=\boxed{\bf \dfrac{61}{7}}[/tex]
[tex]\it~~[/tex]
[tex]\bf d)~2\dfrac{1}{6}+3\dfrac{1}{6}=\dfrac{2\cdot6+1}{6}+\dfrac{3\cdot6 +1}{6}=\dfrac{13}{6}+\dfrac{19}{6}=\dfrac{13+19}{6}=\boxed{\bf \dfrac{32}{6}}[/tex]
[tex]\it~~[/tex]
[tex]\bf e)~4\dfrac{5}{6}+3\dfrac{1}{6}=\dfrac{4\cdot 6+5}{6}+\dfrac{3\cdot6 +1}{6}=\dfrac{29}{6}+\dfrac{19}{6}=\dfrac{29+19}{6}=\boxed{\bf \dfrac{48}{6}}[/tex]
[tex]\it~~[/tex]
[tex]\bf f)~11\dfrac{5}{12}+7\dfrac{11}{12}=\dfrac{11\cdot 12+5}{12}+\dfrac{7\cdot 12 +1}{12}=\dfrac{137}{12}+\dfrac{85}{12}=\dfrac{137+85}{12}=\boxed{\bf \dfrac{222}{12}}[/tex]
[tex]\it~~~[/tex]
[tex]\bf g)~8\dfrac{4}{15}+5\dfrac{7}{15}=\dfrac{8\cdot 15+4}{15}+\dfrac{5\cdot 15 +7}{15}=\dfrac{124}{15}+\dfrac{82}{15}=\dfrac{124+82}{15}=\boxed{\bf \dfrac{206}{15}}[/tex]
[tex]\it~~[/tex]
[tex]\bf h)~9\dfrac{3}{20}+4\dfrac{11}{20}=\dfrac{9\cdot 20+3}{20}+\dfrac{4\cdot 20 +11}{20}=\dfrac{183}{20}+\dfrac{91}{20}=\dfrac{183+91}{20}=\boxed{\bf \dfrac{274}{20}}[/tex]
[tex]\it~~[/tex]
PS: Daca esti pe telefon, te rog sa glisezi spre dreapta pentru a vedea rezolvarea completa
Bafta !
#copaceibrainly
