Question

ce cantitate de mere s-a transportat in 2 de lazi,iecare cantarid 38 kg,daca o lada goala cantareste 2 kg?calculeaza in doua moduri

Answer 1

2x38-2x2=
76-4=72kg

al 2 mod

2x(38-2)=2x36=72kg

Answer 2

I.
1 lada= 38kg 
2 lazi = 38*2= 76 kg
1 lada goala = 2kg
2 lazi goale = 2*2=4 kg
76kg-4kg=72kg de mere s-au transportat.
II.
 38*2-2*2= 76-4=72 kg