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Calculati si completati spatiile punctate:
3,2 dam patrati+6,7 ari-990m patrati=...m patrati?


Răspuns :

3,2dam/2(adica patrati)+ 6,7ari-990m/2=....m/2

3,2dam/2+6,7dam/2-990m/2=
9,9dam/2-990m/2=
990m/2-990m/2= 0 m/2