Question

Ex:2,3,4,5,8si10.DAU COROANĂ!!! Și 89 de puncte.

Answer 1

2)

l = 9 => p = 4x9 = 36 cm

l = 4 => p = 4x4 = 16 cm

l = 3 => p = 4x3 = 12 cm

l = 2 => p = 4x2 = 8 cm

a) perimetrul creste

b) perimetrul scade

3)

(210 : 3) x 60 = 70 x 60 = 4200 batai/ora

4)

200 l .............. 8 g

x l ..............1000 g

x = 200x1000/8 = 25 000 litri

5)

300 m ............. 6 s

x m ............3600 s

x = 300x3600/6 = 180 000 m = 180 km

8)

5 z ........................ 12 m

3 z ...........................x m

x = 5x12/3 = 60/3 = 20 muncitori

10)

Daca 3 robinete pot umple o piscina in 8 ore in cat timp pot umple 4 robinete aceeasi piscina ?