Răspunsuri

  • Utilizator Brainly
2014-02-18T14:42:45+02:00
89+162+115=366
399-366=33
33:3=11 Raspuns: numarul este 11.
9 3 9
2014-02-18T15:03:13+02:00
Fie  x (/-----/) numarul care se scade⇒ a= x+89, b=x+162, c=x+115
Folosim metoda figurativa
a /----/..89..
b /----/.....162......
c /----/.....115..         suma este 399
399 - (89+ 162+ 115)= 399 -  366 =33 suma a 3 segmente egale
33:3=11   ⇒ 11= valoarea unui segment  = x ⇒a =11+89=100, b=11+162=173, c=11+115=126
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