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calculati 4% din nr:1200,250,350

Răspuns :

4÷100 ÷1200 = (4÷100) · (1÷1200)
(4 ·1200) ÷100= 4800 ÷100  =48

4÷100 ÷250 = (4÷100) · (1÷ 250)
(4·250 ) ÷100 = 1000 ÷100 = 10

4÷100 ÷350 = (4÷100) · (1÷ 350)
(4·350 ) ÷100 = 1400 ÷100 
=14