Question

Calculati:
A) 2/5+1/3
B)3/4-2/3
C)1 2/3x15/10
D)7/12+5/6+5/12+1/6
E)5/8+1/6-(1/2-1/3)
IMI TREBE ACUMA CA DAU TEST URGENT DAU 30 PUNCTE

Answer 1

a) 2/5 amplifici cu 3 si iti da 6 pe 15
1/3 amplifici cu 5 si iti da 5 pe 15.
6 plus 5 pe 15 egal cu 11 supra 15

Answer 2

2/5+1/3=6/15+5/15=11/15

3/4-2/3=9/12-8/12=1/12

12/3x15/10=225/30

7/12+5/6+5/12+1/6=7/12+10/12+5/12+2/12=24/12=2

5/8+1/6-(1/2-1/3)=5/8+1/6-(3/6-2/6)=5/8+1/6-1/6=5/8

Cred ca ai inteles. Este vorba despre aducerea fractiilor la acelasi numitor si despre inmultirea a 2 fractii.