Răspuns: [tex]\boxed{ \bf \dfrac{137}{36}}[/tex]
Explicație pas cu pas:
Salutare!
[tex]\bf~~~~[/tex]
[tex]\bf 1\dfrac{8}{9} -\dfrac{5}{6}+2\dfrac{3}{4}=[/tex]
[tex]\bf \dfrac{1\cdot9+8}{9} -\dfrac{5}{6}+\dfrac{2\cdot4+3}{4}=[/tex]
[tex]\bf \dfrac{17}{9} -\dfrac{5}{6}+\dfrac{11}{4}=[/tex]
[tex]\bf \dfrac{4\cdot17}{36} -\dfrac{5\cdot6}{36}+\dfrac{11\cdot9}{36}=[/tex]
[tex]\bf \dfrac{68}{36} -\dfrac{30}{36}+\dfrac{99}{36} =[/tex]
[tex]\boxed{\bf \dfrac{137}{36} }[/tex]
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