Ответы и объяснения

2012-10-19T14:16:04+04:00

75-33/75+33=42/108=6*7/6*18=6/6*7/18=7/18

42-7/42*7=35/42*7=7*5/(7*6)*7=7/7*5/6*7=(5/6*7)/(5/6*7)=5/42

12х4/12+4=12*4/16=(4*3)*4/4*4=4/4*3*4/4=3*4/4=4/4*3=3