Question

A) ( 5 sobre 6) - ( 1 sobre 4 ) B) (2 sobre 3) + ( 1 sobre 2 ) C) ( 5 sobre 8 ) + ( 3 sobre 10 ) D) ( 3 sobre 8) - ( 1 sobre 9) E) ( 7 sobre 8) - ( 8 sobre 9) me ajudem pfv eu quero conta montada de todas !

Answer 1

a)5/6-1/4=
10-3/12=7/12

b) 2/3+1/2=
4+3/6=7/6

c) 5/8+3/10=
25+12/40=37/40

d)3/8+1/9=
27+8/72=35/72

e) 7/8-8/9=
63-64/72=-1/72

Answer 2

a) $\dfrac{5}{6}-\dfrac{1}{4}=\dfrac{10-3}{12}=\boxed{\dfrac{7}{12}}$

b) $\dfrac{2}{3}+\dfrac{1}{2}=\dfrac{4+3}{6}=\boxed{\dfrac{7}{6}}$

c) $\dfrac{5}{8}+\dfrac{3}{10}=\dfrac{25+12}{40}=\boxed{\dfrac{37}{40}}$

d) $\dfrac{3}{8}-\dfrac{1}{9}=\dfrac{27-8}{72}=\boxed{\dfrac{19}{72}}$

e) $\dfrac{7}{8}-\dfrac{8}{9}=\dfrac{63-64}{72}=\boxed{-\dfrac{1}{72}}$