Question

11) 21/22 - 5/11) : 2/3
12) (3/4 - (1/2) во второй степени) : 7/8

Answer 1

$( frac{21}{22} - frac{5}{11} ) div frac{2}{3} = frac{21 - 10}{22} times frac{3}{2} = frac{11}{22} times frac{3}{2} = frac{1}{2} times frac{3}{2} = frac{3}{4}$

$( { frac{3}{4} - frac{1}{2} ) }^{2} div frac{7}{8} = { frac{1}{4} }^{2} times frac{7}{8} = frac{7}{128}$

Answer 2

11) $(frac{21}{22} - frac{5}{11}) :frac{2}{3} = (frac{21 - 10}{22} ):frac{2}{3} = frac{1*3}{2*2}= frac{3}{4} = 0,75$

12) $(frac{3}{4} - (frac{1}{2})^{2} ) : frac{7}{8} = (frac{3}{4} - frac{2}{4} ) : frac{7}{8} = frac{1*8}{4*7} = frac{2}{7}$