Question

1) aflati:
a) 2 supra3 din 270 cg;90 minute;183lei
b)3 supra 5din25m;1080 sec.;250 cg;325 lei 
c)7 supra 4din 4200;1820;5088;3500
   2)pretul unei carti este de 32 lei.cat costa cartea dupa o reducere cu 3 supra 8 din pretul initial?

Answer 1

2/3 *270=2/1 *90=180cg
2/3 *90=2/1 *30=60 minute
2/3 *183=2/1 *61=122 lei
3/5 *25=3/1 *5=15 m
3/5 *1080=3/1 *216=648
3/5 *250=3/1 * 50=150 cg
3/5 *355=3/1 *71=213
7/4 *4200=7/1 *1050=7350
7/4 *1820=7/1 *455=3185
7/4 *5088=7/1 *1272=8904
7/4*3500=7/1 *875=6125

3/8*32=3/1*4=12 lei reducerea
32-12=20 lei pretul cartii dupa reducere