Question

calcule o valor das expressoes a)3/4-2 1/2+1/4 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)3/4-2 1/2+1/4 =1-5/4 =-1/4
b) 3-2 1/2+1/4 =3-5/2+1/4=3-10/4+1/4=3-9/4=3/4
c) 1/2+ 1 1/3 -1 1/4 =1/2+4/3-5/4=4/3-3/4=7/16
 
d) 11/12- 5/6+2/9 =(66-60)/108+2/9

=1/18+2/9 =5/18