Question

Calculati a) 1/2 1/4 b)1/3+5/6 c)1/4+3/8 d)2/5+3/10 e)3/4+5/6 f)5/7+4/9

Answer 1

a) 1/2*1/4=1/8
b) 1/3+5/6=? amplificam prima fractie cu 2 => 2/6+5/6=7/6
c) 1/4+3/8=? amplificam prima fractie cu 2 => 2/8+3/8=5/8
d) 2/5+3/10=? amplificam prima fractie cu 2 => 4/10+3/10=7/10
e) 3/4+5/6=? amplificam prima fractie cu 6, iar pe a doua cu 4 =>        18/24+20/24=38/24
f) 5/7+4/9=? amplificam prima fractie cu 9, iar pe a doua cu 7 =>  45/63+28/63=73/63