Question

dau coroanaaaaaaaaaaaaaaaaaaaa
macar un ex să fie făcut ​

Answer 1

Răspuns:

ex.1

20%

ex.2

3/7+2/7=5/7

5/9-4/9=1/9

2/3×4/5=8/15

(3/5)^2=9/25

2/2:3/4=4/3

ex.3

a)

7/8+3/6=21+12/24=33/24( amplificam prima fractie cu 3 si a doua fractie cu 4 pt a stabili numitorul comun 24)

b)

5/3-4/9=15/9-4/9=11/9(amplificam cu 3 prima fractie)

c) 8/9×3/4=2/3(simplificam in diagonala 8 cu 4 si 3 cu 9)

d)(3/4)^3=27/64