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adunari cu descompuneri​

Răspuns :

Răspuns:

345+678= 1023 = 1000+20+3

145+145=290=200+90

123+234=357=300+50+7

1000+2345=3345=3000+300+40+5

1111+2222+1111+2222=6666=6000+600+60+6