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Grupeaza convenabil termenii si efectueaza

345+255+165+75+55+45+35+25=


Răspuns :

345+255+165+75+55+45+35+25=
345+55    +
255+45   +
165+35   +
75+25   =
400+300+200+100=1000
345+55=400
255+45=300
165+35=200
75+25=100
toate impreuna fac 1000