Question

4. calcular e apresentar o resultado bob a forma de fração irredutivel:
4.1 ) 5/3 . 7/4 - 1/2 ÷ 3

4.2) (1/3)² +1/2 ÷ 3/7 -1

4.3) 2³ .( 0,5+07/2)÷3/10

Answer 1

4.1) 
$\frac{5}{3} . \frac{7}{4} - \frac{1}{2} :3= \frac{35}{12} - \frac{1}{2} :3 = \frac{35-6}{12} :3 = \frac{29}{12}:3 = \frac{29}{36} =$

4.2)
$\frac{1}{3} + \frac{1}{2} : \frac{3}{7} -1= \frac{1}{3}+ \frac{1}{2} . \frac{7}{3} -1= \frac{1}{3} + \frac{7}{6} -1= \frac{2+7-6}{6} = \frac{3}{6}= \frac{1}{2}$

4.3)
$2^3(0,5+07/2): \frac{3}{10} = 8( \frac{1}{2} + \frac{7}{2} ):\frac{3}{10}=8( \frac{8}{2}): \frac{3}{10}=32* \frac{10}{3}= \frac{320}{3}=$