Question

determine o valor de cada expressão
a) ( - 3/25 ) - ( -9/10 )

b) ( 5/7 ) + ( - 3/4 )

c) 5/4+ ( -4/9 ) + ( + 1/3 )

d) ( -2/3 ) - ( + 3/10 ) - ( + 1/2 )

Answer 1

Explicação passo-a-passo:

$a) ( - 3/25 ) - ( -9/10 )=\frac{39}{50}=0,78\\\\b) ( 5/7 ) + ( - 3/4 )=-\frac{1}{28}=-0,0357\\\\c) 5/4+ ( -4/9 ) + ( + 1/3 )=\frac{41}{36}=1,138\\\\ d) ( -2/3 ) - ( + 3/10 ) - ( + 1/2 )=-\frac{22}{15}=-1,46$

- Bons estudos :)