Question

Calculati:2supra3+5supra6,13supra25+7supra10,9supra20+4supra5

Answer 1

$\boxed{\bold{Learned}}$

Answer 2

Răspuns:

a)2/3+5/6=

Descompunem numitorii

3=3    6=2x3

[3,6]=2x3=6    N.C.=6

6:3=2   6:6=1

Acum amplific fractiile:

Amplific cu 2 fractia 2/3=4/6

Amplific cu 1 fractia 5/6=5/6

4/6+5/6=9/6(adun doar numaratorii)

b)9/20+4/5

Descompunem numitorii:

20=2 la puterea a doua x 5

5=5 x 2 la puterea a doua

[20,5]= 20 N.C.=20

20:20=1    20:5=5

Acum amplific fractiile:

Amplific cu 1 fractia 9/20=9/20

Amplific cu 4 fractia 4/5=16/20

9/20+16/20=25/20