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calculeaza apoi verifica rezultatu a)4257+3507; b) 7764-2704; 5902-1528

Răspuns :

4257+3507=7764
7764-3507=4257 verificare

7764-2704=5060
5060+2704=7764

5902-1528=4374
4374+1528=5902
A) 4257+3507=7764
Verificare=7764-3507=4257

B). 7764-2704=5 0 60
Verificare= 5060 + 2704