Question

Ex7,8,9a) varog frumos urgent dau coroana

Answer 1

7)a)a+a+a+a+a=5a

$a \times a \times a \times a \times a = a {}^{5}$

b)a-3-3-3-3-3-3-3=0

a-6×3=0

a-18=0

a=18

a-5-5-5-5=2

a-20=2

a=22

8)a)Se da factor comun

18×17+12×17

17×(18+12)=17×30=510

c)129×24+76×129

129×(24+76)

129×100

12900

9)a)Trebuie doar sa le aduni

18a+15a=33a

☆Mult succes!☆