Question

AYUDAAA PORRR FAAA!!!!!

Answer 1

Un tema mas de numeros fraccionarios

Explicación paso a paso:

A)

$\frac{27}{31} - \frac{13}{31} = \frac{27 \times 31 - 31 \times 13}{31 \times 31} = \frac{837 - 403}{361} = \frac{434}{361} = \frac{434 \div 31}{361 \div 31} = \frac{14}{31}$

B)

$- \frac{1}{5} - \frac{3}{8} = \frac{ - 1 \times 8 - 5 \times 3}{5 \times 8} = \frac{ - 8 - 15}{40} = \frac{ - 23}{40}$

C)

$- \frac{2}{3} - \frac{ - 1}{6} = \frac{ - 2 \times 6 - 3 \times - 1}{3 \times 6} = \frac{ - 12 - - 3}{ 18} = \frac{ - 9}{18} = \frac{ - 9 \div 3}{18 \div 3} = \frac{ - 3}{6} = \frac{ - 3 \div 3}{6 \div 3} = \frac{ - 1}{2}$

D)

$\frac{3}{7} - \frac{ - 1}{7} = \frac{3 \times 7 - 7 \times - 1}{7 \times 7} = \frac{21 - - 7}{49} = \frac{28}{49} = \frac{28 \div 7}{49 \div 7} = \frac{4}{7}$

E)

$\frac{ - 1}{2} - 1 \frac{3}{5} = \frac{ - 1}{2} - \frac{8}{5} = \frac{5 \times - 1 - 2 \times 8}{2 \times 5} = \frac{ - 5 - 16}{10} = \frac{ - 21}{10}$