M |__|__|__|__| - 10
C |__|__|__|__| + 30
D |__||__|__|__| x 4
A |__|__|__|__||__|__|__|__||__|__|__|__| : 3 } 545 LEI
(4s - 10) + (4s + 30) + 1s + (12s) = 545
21s = 525
1s = 25 lei (Dragos)
4s - 10 = 4×25 - 10 = 100 - 10 = 90 lei (Mihai)
4s + 30 = 4×25 + 30 = 100 + 30 = 130 (COrina)
12s = 12×25 = 300 lei (Ana)
Verificare :
M+C+D+A = 25+90+130+300= 545 lei
|_____|_____|_____|_____|_____|
|_____|+24 mere
1/5 |____|____|____|____|
|____|+24 pere
1/4 |___|___|___|
|___|+24 gutui
1/3
24 = 2/3=> 3/3 = 24×3/2 = 72/2 = 36 gutui
36+24 = 60 = 3/4 => 1/4 = 60/3 = 20
20 + 24 = 44 pere
4/4 = 80
4/5 = 80+24 = 104 => 1/5 = 104/4 = 26
26 + 24 = 50 mere
