Question

Amplificarea fractilor :
1) 1/3+1/9+1/27=?
1/5+1/25+1/125=?

Answer 1

1) numitorul comun este 27
amplificam prima fractie cu 9 si a doua cu 3
9/27+3/27+1/27 = 12/27+1/27 = 13/27

2)  numitorul comun este 125
amplificam prima fractie cu 25  si a doua  cu 5
25/125+5/125+1/125 = 30/125+1/125 = 31/125

Answer 2

1/3+1/9+1/27=1/3 amplifici cu 9=9/27+1/9 amplifici cu 3=3/27, acum le aduni: 9/27+3/27+1/27=13/27

1/5+1/25+1/25=1/5 amplifici cu 5=5/25+1/25+1/25=7/25