Question

Am nevoie de ajutor !!! Dor primul subiect

Answer 1

Explicație pas cu pas:

1.a) 2km=2000m

7dam=70m

b)42hm=4200m

500cm=5m

c)4800dm=480m

5000mm=5m

2.a)5kl=5000l

9dal=90l

b) 34hl=3400l

400cl=4l

c) 7300dl=730l

7000ml=7l

3. a) 3t=3000kg

5q=500kg

b) 4hg=0,4kg

7000g=7kg

c) 300dag=3kg

400hg=40kg

4.a) 12h=12•60=720min

b) 45 zile=24•45=1080h•60=64800min

c)7200s=7200÷60=120min

5.a) 2 milenii=2000 ani

b)7 deceni=70 ani

c) 15 secole=1500 ani

6. L=800m

l=1/4•800=200m

2•P=2•[2•(800+200)]=2•(2•1000)=2•2000=4000m=4km

Tanarul a parcurs 4km(4000m).