inmultiri:
7/2x3/5=(7x2)/(3x5)=14/35
fractiile la inmultire se pot simplifica, de ex.
3/12x5/6=se simplifica cu 3=1/12x5/2=(1x5)/(12x5)=5/60=se simplif.cu 5=1/12
impartiri:
3/5:8/6=3/5x6/8=18/40=se simplif.cu 2=9/20
ADUNARI SI SCADERI
3/6+5/6-2/6=(3+5-2)/6=6/6=1
cand au numitor diferit:
3/9+5/32-6/12=
cand avem numitori diferiti procedam astfel:
aduce fractia la acelasi numitor: pt.aceasta calculam c.m.m.m.c
9=3²
32=2⁵
12=3x2²
[9,32,12]=2⁵x3²=32x9=288 este numitorul comun
288:9=32
288:32=9
288:12=24
DECI 3/9+5/32-6/12=(3X32+5X9-6X24)/288=(96+45-144)/288=-3/288
SPER CA AI INTELES
