Question

preciso de ajuda com isso :
(+1/3)-(+2/5)
(+9/10)-(-4/5)
(+5/3)+(+4/5)+(-7/15)
+(+9/4)+(-2/3)+(-5/12)
(+9/7)x(-3/4)
(-6/5)x(-9/2)
(-4/5)÷(+2/3)
(-2/3)÷(-1/4)
(-2/3)²
(+1/5)²

Answer 1

Explicação passo-a-passo:

$(+1/3)-(+2/5)= \frac{1}{15\\}\\\\ (+9/10)-(-4/5)= \frac{17}{10} \\\\(+5/3)+(+4/5)+(-7/15)+(+9/4)+(-2/3)+(-5/12)= \frac{19}{6} \\\\(+9/7)*(-3/4)=- \frac{27}{28} \\\\(-6/5)*(-9/2)= \frac{27}{5} \\\\(-4/5)/(+2/3)= -\frac{6}{5} \\\\(-2/3)/(-1/4)= \frac{8}{3} \\\\(-2/3)^2= \frac{4}{9} \\\\(1/5)^2= \frac{1}{25}$

- Bons estudos :)