Question

Intr-o ferma sunt 110 pasari: rate si gaste.Cate rate si gaste sunt, stiind ca numarul ratelor este o zecime din numarul gastelor?

Answer 1

r+g=110
g=10r

r+10r=110
11r=110
r=110:11
r=10
g=10x10
g=100

Answer 2

Notam:
r= rate
g = gaste
r+g = 110
r = g:10 => g = 10×r

g |__|__|__|__|__|__|__|__|__|__|
r |__|

Avem 11 segmente egale = 110
110:11 = 10 ( un segment)
g = 10×10 = 100 ( gaste)
r = 10 ( rate)

V. 100+10 = 110
10 = 100:10
10 = 100