Question

calcular as expressões, efetuando-se primeiramente entre os parênteses:
a) ( 1 1/3 + 1) - ( 4/5 + 1/10)=

Answer 1

$(1 \frac{1}{3} +1)-( \frac{4}{5} + \frac{1}{10} )= \\ \\ ( \frac{4}{3} +1)-( \frac{8+1}{10} )= \\ \\ ( \frac{4+3}{3} )- \frac{9}{10} = \\ \\ \frac{7}{3} - \frac{9}{10} = \\ \\ \frac{70-27}{30} = \frac{43}{30} \mapsto1~inteiro~e~ \frac{13}{30}$