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Afla numerele necunosute ,dupa modelul dat:241+a=457, a+342=671, 517+a=834, a+236=576,

Răspuns :

a=457-241
a=671-342
a=834-517
a=576-236 
 ;)

241+a=457 a=457-241 a=216 b) a+236=671 a=671-236 a= 435 c)517+a=834 a=834-517 a= 317 d)a+236=576 a=576-236 a= 340