Question

Dúvidas nas questões de fração. ajuda? Urgente!

ed2c9b0a954cc017dde950d03993f859.docx

Answer 1

a) (1/2/3/4)+ (1/5/1/5*1/5)= 2/3 + 5=(2+15)/3= 17/3

b) 1/2+ 6*9/4 - (-3)= 1/2+54/4+3= (2+54+12)/4=68/4=17

Answer 2

a)
                   $\frac{1- \frac{1}{2} }{ \frac{3}{4} } + \frac{ \frac{1}{5} }{1- \frac{4}{5} } \\ \\ = \frac{ \frac{1}{2} }{ \frac{3}{4} } + \frac{ \frac{1}{5} }{ \frac{1}{5} } \\ \\ = \frac{1x4}{2x2} + \frac{1x5}{5x1} \\ \\= 2$

b)
                   $2^{-1} +6.( \frac{2}{3}) ^{-2} -(- \frac{1}{3}) ^{-1} \\ \\ = \frac{1}{2} =6( \frac{3}{2})^2-(-3) \\ \\ = \frac{1}{2} +6( \frac{9}{4}) +3 \\ \\ = \frac{1}{2} + \frac{27}{2} + \frac{6}{2} \\ \\ = \frac{34}{2} \\ \\ =17$