Question

ex 1: doi frati au impreuna 120 de timbre . ca sa aiba acelasi numar de timbre ,fratele cel mare îi da celui mic un sfert din numarul sau de timbre. Cate timbre au avut fiecare frate frate la inceput?
ex :2 Nadia si sascha culeg nuci. in timp ce nadia culege 5 nuci , sacha culege 4 nuci . cate nuci a cules fiecare data impreuna au cules 108 nuci?
rapid va roooooog !

Answer 1

1)
a +b = 120 timbre
a |___|___|___|___|
b |___|___|
120 : 6 = 20 (un segment egal)
a = 4×20 = 80 timbre
b = 2×20 = 40 timbre

verificare:
80 + 40 = 120
80 - 80 : 4 = 40 + 80 : 4
80 - 20 = 40 + 20
60 = 60 (adevarat)

2) N + S = 108 nuci
5×N = 4×S
N |____|____|____|____|
S |____|____|____|____|____|
108 : 9 =12 (un segment egal)
N = 4×12 = 48 nuci (Nadia)
S = 5×12 = 60 nuci (Sacha)