Question

Va rog frumos îmi trebuie mâine exercițiul 1 Dau 40 puncte!

Answer 1

a)
4/11*2 3/4+5/2*3*3 1/5+3/2÷2 1/2÷3/5 =4/11*11/4+5/2*3*16/5+3/2÷5/2÷3/5 =
=1+15/2*16/5+3/2*2/5*5/2=1+24+3/2=25+3/2=50/2+3/2=53/2

b)
3 27/70* 5,8(3)-0,75=(3*70+24)70×(583-58)/90- 75/100=234/70*525/90- 75/100=13/5-3/4=52/20-15/20=37/20

c)
30/7÷25/14+2 1/3×3/14=30/7*14/25+(2*3+1)/3*3/14=12/5+1/2=24/10+5/10=
=29/10

d)
(2/3)³ +(2/3)²- 1/3*[0,(3)]²= 8/27+4/9 - 1/3*(3/9)²= 8/27+12/27- 1/3* (1/3)²=
=20/27 - 1/3*1/9= 20/27- 1/27= 19/ 27

e) 3,0(6)- 1 1/15÷1 3/5+1/5÷(3/2)²= (306-30)/90- 16/15÷8/3+1/5÷9/4=
276/90-16/15*3/8+1/5*4/9=276/90 - 2/5+4/45=276/90-36/90+8/45=
=248/90=124/45