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4 sub 80 : 18 sub 25 - 1 pe 6
Va roggggg repede



Răspuns :

4/80=1/20
1/20*25/18-1/6=25/360-1/6=(25-60)/360 = -5/360 = -72
4/80÷18/25-1/6=1/20÷18/25-1/6=1×25/20×18-1/6=25/360-1/6
amplificam pe 1/6 cu 60 =
25/360-60/360=-35/360
sper ca am ajutat