<span>а) (4*1/3)/(5/6+0,25)=4/3 :(5/6+ 1/4)= 4/3: 13/12=4/3*12/13=16/13=1 3/13</span>
<span>б) <span>3,6*(7/12+1/9)=3,6* 25/36= 36/10*25/36= 25/10=2,5</span></span>
<span><span>в) <span>(7/12-2/15)/0,9= 27/60 : 0,9= 9/20:9/10=9/20*10/9= 1/2 = 0,5</span></span></span>
<span><span><span>г) <span>(5/8-1/3)*(1 *5/7)= 7/24 * 5/7= 5/24</span></span></span></span>
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<span><span><span><span>в примере г) в условии во второй скобке ошибка или нету?</span></span></span></span>