(2*510)/15=68 г, (6*504)/42=72 г, 11/13=231 => (231*13)/11=273 г,(338*50)/26=650 г
176/100= 1 76/100= 1.76
9/1000=0.009
Так и пиши в тетрадь!
2 25/100 + 11 1/15 - 7 1/6 = 2 1/4 + 11 1/15 - 7 1/6 = 2 15/60 + 11 4/60 - 7 10/60 = 13 19/60 - 7 10/60 = 6 9/60