Răspuns :
a |-----|+5|
b |-----| } 89.
89 - 5 = 84 ( 2 segmente egale)
84 : 2 = 42 (b)
42 + 5 = 47 (a)
Verificare : 47 + 42 = 89.
b |-----| } 89.
89 - 5 = 84 ( 2 segmente egale)
84 : 2 = 42 (b)
42 + 5 = 47 (a)
Verificare : 47 + 42 = 89.
I---I+5
I---I
egalam partile:89-5=84
aflam nr.mai mic:84÷2=42
aflam celalalt nr.:42+5=47
proba:42+47=89
I---I
egalam partile:89-5=84
aflam nr.mai mic:84÷2=42
aflam celalalt nr.:42+5=47
proba:42+47=89