Question

Suma dintre a+a:2+2a=49, a=?. Metoda grafica

Answer 1

3a + a/2 = 49
Amplificam 3a si 49 cu 2 ca sa aducem la numitor comun si inmultim cu 2 tot ca sa scapam de numitori.
6a + a = 98
7a = 98
a = 98/7 = 14

Answer 2

$\it\ \left.\begin{aligned}a:2\ \ |\rule{30}{0.8}| \\ a\ \ \ \ \ \ \ \ |\rule{30}{0.8}| |\rule{30}{0.8}|\\ 2a\ \ \ \ \ \ |\rule{30}{0.8}| |\rule{30}{0.8}| |\rule{30}{0.8}| |\rule{30}{0.8}|\end{aligned}\right\}\ 49$

Avem 7 segmente egale.

49:7 = 7 (un segment)

a = 2· 7 = 14