Question

exercitiile acestea va rog

Answer 1

Aceea spaniola presupun ca nu trebuie...

1)a=(2,7-0,95)*4+2,35=1,75*4+2,35=9,35
2)b=(5,34+10,87):0,01-44,5=16,21*100-44,5=1621-44,5=1576,5
3)Marit(9,35+1576,5)/2=792,925
4)a+2b+c=a+b+b+c=20,3+23,14=43,44
5)986
6)Pix-x, stilou-y, caiet-z. x+y=5 si y+z=7 si x+z=6
Din 1: y=5-x, in a 2-a: 5-x+z=7, z=x+2, in a 3-a: x+x+2=6, 2x=3, x=2.
y=5-x=5-2=3; z=x+2=2+2=4.
7)15,5 kg.......55,18 lei
2,3kg....................x lei,  x=2,3*55,18/15,5=8,188lei
8)P=2(L+l)=2(3l+l)=8l, l=P/8
l=105,2/8=13,15cm, L=3l=13,15*3=39,45cm
9)Marit=(a+b+c+d)/4=(32,45+403,009)4=108,87725
10)1003,9-x=423,5+0,004, x=1003,9-423,5-0,004=580,396
11)52,34-3,15=49,19≈49,2
12)5,621-3,823+15,2199=17,0179≈17
13)x+9143,7-978,29=x+8165,41. A crescut cu 8165,41.
14)(x:0,31)+1,1=22,5;  x:0,31=21,4; x=6,634