Question

Ma ajutati la ex. 4,6,7 ??DAU COROANA !!!!!

Answer 1

4)
1/3h=20 min,
1/6h=10 min,
1/60=1 min,
15/60=15 min,
 30/60=30 min  
 1h=60 min   

5)
60:2=30,        60:4=15,     60:3=20,      60:5=12,    60:10=6
180:2=90,     180:4=45,   180:3=60,   180:5=36,   180:10=18
480:2=240,   480:4=120, 480:3=160,  480:5=96    480:10=48
840:2=420,   840:4=210,  840:3=280,  840:5=168   840:10=84

6)
1/2=0.5m=0.005km
3/4=0.45m=0.045km
2/5=0.4m=0.004km
3/10=0.3m=0.003km

7)
24x1/4=6ore
24x1/2=12 ore
24x2/6=8 ore