Question

1. Calculati:
a) 2 2/5+3 3/5
b) 1/5•3/2
c) (-2/3)³
2. Dacă a=3, calculați a+1/a
3. Fie a=0(3) si b=3/2. Calculați a:b
4. Calculati, folosind eventual proprietatea de asociativitate:
a) (1 2/3•5/7)•(3/2•7/5)•3/5
5. Calculați:
a) (-3/4-1/8:3/4):(+13/8)
b) (1/1•2+1/2•3+. . . +1/99•100):[(3/5)⁴•(3/5)³:(3/5)totul la 5]

Answer 1

a)12/5+18/5= 30/5 = 6 b)3/10 C) 8/9 2) 3+1/3 .....amplifici la prima cu 3 ......9/3+1/3= 10/3 3) a= 0,(3) = 3/9. b= 3/2. a:b = ? 3/9 • 2/3 = 18 4) a) 25/21 •21/10• 3/5 = 5/2 • 3/5 = 6