Question

efetue as adições : A) 0,3+1/4+0,05 B)2 1/4+1,3+0,02

Answer 1

a
0.3 = 3/10
0.05 = 5/100 =1/20 
reescrevendo
3/10 + 1/4 + 1/20 =
mmc = 20
( 6 + 5 + 1)/20  = 12/20  = 3/5 ****  ou  0.6 ***

b
2 int 1/4 = ( 4 *2) + 1 = 9/4   
1,3 = 13/10
0.02 = 2/100 = 1/50 
reescrevendo
9/4 +  13/10 + 1/50 =
mmc 4,10,50 = 100
( 225 + 130 + 2 )/100 = 357/100  ou 3,57 *****