Question

1. Transforma si calculeaza:
3 h + 45 min =____________________Secunde
30 ani + 1 secol =____________________Ani
175 tone + 500 kg =_________________Quintale
200 l + 200 dl =____________________Litri

2. Daca Intr-o zi doi porumbei au parcurs in zbor 1550 de km, in 5 zile, cati km vor parcurge?

3.La dferenta fractiilor 15/3 si 5/3, adauca suma fractiilor 7/3 si 18/3.

Va rog ajutatima!
plz

Answer 1

1.
3 h + 45 min = .....s
3 h = 3600 s
45 min = 2700 s
3600 s +2700 s = 6300 s

30 ani + 1 secol = .... ani
1 secol = 100 ani
30 ani + 100 ani = 130 ani

175 t + 500 kg = q
175 t = 1750 q
500 kg = 50000 q
1750 q + 50000 q = 51750 q

200 l + 200 dl = l
200 dl = 20 l
200 l + 20 l = 220 l

2.
Varianta 1
1550 kg ....….1 zi
x kg...............5 zile
d.p ↓↓
1550 /x = 1/5 → x = 1550*5/1 = 7750 km

Varianta 2
1550 km * 5 = 7750 km


3.
(15/3 + 5/3 ) + (7/3+18/3) = 20/3 + 25/3 = 45/3