Question

va rog sa ma ajutati ​

Answer 1

Răspuns:

1.800 cm=8 m

75 dam=7500 dm

510 dg=5100 g

7000 l=70 hl

70 dl=7000 ml

8 minute=480 min

2. 710 m+1200 dam=71000 cm+1200000 cm=1271000 cm

5000 cg -2000 mg=50 g-2 g=48 g

71 dag+ 81 hg=71000 cg+810000 cg=881000 cg

3 hl+2 kl=300 l+2000 l=2300 l

8 secole+7 decenii=800 ani+70 ani=870 ani

3. 15²⁰-11³⁰=3⁵⁰

4. 50 g+2000 dg+180 dag=50 g+200 g+1800 g=2050 g

5. a)36 km/h=3600 m/s

b)100 m/s=0,1 km/h

6. d=300 m

s=60 s

v=300 m/60 s=>v=5 m/s

7. d=1,2 dm=0,12 m

10 min=600 s

v= 0,12 m/ 600 s=> v=0,0002 m/s

8. v1=18 km/h

v2=6 m/s=>v2=0,006 km/h

v1>v2