Explicație pas cu pas:
a) 5/40 => 5÷5=1 ; 40÷5=8
=> 5/40=1/8
7,5/60 => 7,5:7,5=1 ; 60÷7,5=8
=> 7,5/60=1/8
1/8=5/40=7,5/60
b)?
c) 12/6=30/15=> 12•15=180 ; 30•6=180
12/4=30/10=> 12•10=120 ; 4•30=120
6/12=15/30=> 6•30=180 ; 15•12=180
4/12=10/30=> 12•10=120 ; 4•30=120
/=supra,pe
•=înmulţire
Sper că te am ajutat! Coroana?