Question

1. 3 stilouri si 2 pixuri costa 108 lei iar 3 stilouri si 1 pix costa 102 lei.Cati lei costa un pix?Dar un stilou?

Answer 1

3stilouri.........2pixuri.........108lei

3stilouri...........1pix...............102 lei

/.....................1 pix.............6 lei

1pix=6lei

3stilouri+6x2=108

3stilouri=108-12

3stilouri=96

1stilou=96:3=32 lei

folosesti metoda comparatiei

Answer 2

3 stilouri .............2 pixuri ............... 108 lei

3 stilouri ............. 1 pix ..................... 102 lei

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                         2 - 1 = 1 pix      108 - 102 = 6 lei

102 - 6 = 96 lei costa 3 stilouri

96 : 3 = 32 lei costa un stilou