Question

Muito fácil

determine o valor de cada soma .

$a \: \frac{11}{2} + \frac{7}{2}$

$b \: - \frac{6}{5} + \frac{4}{3}$

$c \: \frac{7}{3} - \frac{9}{2}$

$d \: - \frac{3}{7} - \frac{6}{5}$

$e \: 0.75 + 3.24$

$f \: - 3.21 + 6.5$

$g \: 17.2 - 6.17$

$h \: - 62.1 - 8.17$

i 11/2 - 4/3 + 7/6

*com cálculos

Answer 1

a) $\frac{11}{2} + \frac{7}{2} = \frac{11+7}{2} = \frac{18}{2}$
b)$\frac{-6}{5} + \frac{4}{3} = \frac{-6*3}{5*3} + \frac{4*5}{3*5} = \frac{-18}{15}+ \frac{20}{15} = \frac{-18+20}{15} = \frac{2}{15}$
c)$\frac{7}{3} - \frac{9}{2} = \frac{7*2}{3*2} - \frac{9*3}{2*3} = \frac{14}{6} - \frac{27}{6} = \frac{14-27}{6} = \frac{-13}{6}$
d)$-\frac{3}{7} - \frac{6}{5} = -\frac{3*5}{7*5} - \frac{6*7}{5*7} =- \frac{15}{35} - \frac{42}{35}= \frac{-15-42}{35} =- \frac{57}{35}$

e) 0,75+3,24=3,99
f) 3,21+6,5=9,71
g) 17,2 - 6,17=11,03
h) - 62,1 - 8,17= - 70,27
i)$\frac{11}{2} - \frac{4}{3} + \frac{7}{6} = \frac{11*3}{2*3} - \frac{4*2}{3*2} + \frac{7}{3}= \frac{33}{6} - \frac{8}{6} + \frac{7}{6} = \frac{33-8+7}{6}= \frac{32}{6}$ simplifica (÷2)$\frac{16}{3}$