Question

Calculati (-7/12)+(-5/12)
(+1/2)+(-2/3)
(-1/3)+(-1/6)+(+5/8)+(-7/12)
(-4/5)+(-1/10)+(+5/6)+(4/15)

Answer 1

[tex]- \frac{7}{12} - \frac{5}{12} =- \frac{12}{12} =-1\\\\ 1/2-2/3=1/6\\\\ -1//3-1/6-5/8-7/12=164/96\\\\[/tex](ultimul chiar nu îl știu, dar sper ca te ajuta cat de cât răspunsul meu.)