Question

Trei copii au 368 bomboane.
Alina are de 2 ori mai multe decat Marius, iar Gabi are cu 8 mai multe ca Alina.
Cate bomboane are fiecare?

Answer 1

Notam:
Alina-A
Marius-M
Gabi-G

Vom folosi metoda figurativa:
M___
A___,___
G___,___,8

Vom aduna figurativ segmentele:
M+A+G=___,___,___,___,___,8=368

Notam un segment cu "x".

Aflam suma segmentelor:
5x=368-8
5x=360

Aflam cat e un segment, adica cate bomboane are Marius:
x=360:5
x=72(bomboane are Marius)

Aflam cate are Alina:
2x=72•2
2x=144(bomboane are Alina)

Aflam cate are Gabi:
2x+8=2•72+8=144+8=152(bomboane are Gabi)

RASPUNS: A=144. M=72. Gabi=152.
VERIFICARE: A+M+G=144+8+72=368

Sper ca s-a inteles! Apropo:scrie calculele nu si explicatiile mele.
Spor la treaba!