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Cristian avea 26 cuburi,el a pierdut 7 cuburi dar a mai primit 8 .Cate cuburi are Cristian?

Răspuns :

(26-7)+8=19+8
=27

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26-7=19(cuburi/ramase)
19+8=27(cuburi/total)
R: 27 cuburi

Succes!