Question

2. Sabendo que a= ¾ e b= - 7/3
calcule:
a) a + b =
b) a - b =
c) b - a =​

Answer 1

Resposta:

$a) \frac{3}{4} + ( - \frac{7}{3} ) \\ \frac{9 - 28}{12} \\ - \frac{19}{12}$

$b) \frac{3}{4} - ( - \frac{7}{3} ) \\ \frac{3}{4} + \frac{7}{3} \\ \frac{9 + 28}{12} \\ = \frac{37}{12}$

$c) - \frac{7}{3} - \frac{3}{4} \\ \frac{ - 28 - 9}{12} \\ - \frac{37}{12}$

Bons estudos!

Answer 2

Resposta:

$\frac{3}{4} + \frac{-7}{3} = \frac{(3*3)+(4(-7))}{(3*4)} = \frac{9-28}{12} = \frac{-19}{12} = -1,58333...\\\\\frac{3}{4} - \frac{-7}{3} = \frac{(3*3) - (4(-7))}{4*3} = \frac{9+28}{12} = \frac{37}{12} = 3.08333....\\\\\frac{-7}{3} - \frac{3}{4} = \frac{(4(-7)-(3*3)}{3*4} = \frac{-28-9}{12} = \frac{-37}{12} = -3.08333...$

Explicação passo-a-passo: