a) 1/2+ 5/6 ÷4/3 − 1/5 =

b) 9/21 x 7/9 ÷ 1/3=

c) 4/5 + 7/6 x 0,8 x 35/24=

Respuestas

Respuesta dada por: IvyChen
2

Respuesta:

a) \frac{1}{2}  +  \frac{5}{6}  \div  \frac{4}{3}  -  \frac{1}{5}  =  \\  \frac{1}{2}  +  \frac{5}{6}  \times  \frac{3}{4}   -  \frac{1}{5}  =  \\  \frac{1}{2}  +  \frac{5}{8}  -  \frac{1}{5}  =  \\  \frac{20}{40}  +  \frac{25}{40}  -  \frac{8}{40}  =  \\  \frac{37}{40}

b) \frac{9}{ 21}  \times  \frac{7}{9}  \div  \frac{1}{3}  =  \\   \frac{3}{7}  \times  \frac{7}{9}  \times 3 =  \\ 1

c) \frac{4}{5}  +  \frac{7}{6}  \times 0.8 \times  \frac{35}{24 }  = \\   \frac{4}{5}  +  \frac{7}{6}  \times  \frac{8}{10}  \times  \frac{35}{ 24}  =  \\  \frac{4}{5}  +  \frac{7}{6}  \times  \frac{4}{5}  \times   \frac{35}{24}  =  \\  \frac{4}{5}  +  \frac{49}{36}  =  \\  \frac{144}{180}  +  \frac{245}{180}  =  \\  \frac{389}{180}

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