Question

resolva A)0,777... -0,3+3/7

B)1,5+6/10 -0,1212....

Answer 1

0,777... = 7/9
0,3 = 3/10
7/9 - 3/10 + 3/7 = 
mmc (9,7,10) = 630
(630:9*7)/630 - (630:10*3)/630 + (630:7*3)/630 = 
490/630 - 189/630 + 270/630 = 31/630