Question

0,75 -0,75 *(19/10 -1,5.) (1/3+0,25)(1+5/7). 2/5*(0,5+0,5 *1/3)​ va rog urgent

Answer 1

a) 75/100-75/100*(19/10-15/10)= 75/100-75/100*4/10= 75/100-15/50= 3/4-3/10 amplificam pe 3/4 cu 5 si pe 3/10 cu 2

15/20-9/20= 6/20=3/5

b) amlificam pe 1 cu 7, pe 1/3 cu 4 si pe 1/4 cu 3

(1/3+1/4)(7/7+5/7)= (4/12+3/12)*12/7=7/12*12/7=1

c) 2/5*(5/10+5/10*1/3)= 2/5*(5/10+5/30)=2/5*(1/2+1/6) amplificam  pe 1/2cu 3

2/5*(3/6+1/6)= 2/5*4/6= 4/15