Question

Calcule em seu caderno o valor das expressões : a) 3/4 + 1/3 - 1/6 b) 3 + 2 1/2 - 1/4 c) 1/2 + 1 1/3 - 1 1/4 d) 11/12 - 5/6 + 2/9 :

Answer 1

a) 3/4 + 1/3 - 1/6 =  ( 9+4-2)/12 ==> 11/12

b) 3 + 2 1/2 - 1/4 =  3 + 5/2 - 1/4 ==> ( 12+10-1)/4 ==> 21/4

c) 1/2 + 1 1/3 - 1 1/4 =  1/2 +  4/3 - 5/4 ==> (6+16-15)/12 ==> - 3/12

d) 11/12 - 5/6 + 2/9 = ( 33-30+8)/36 ==> 11/36