14/45-(12/45+1/45)=? 70/190-(15/190+20/190)=?
6/12+(5/12-1/12)=?
121/300-(10/300+90/300)=?
43/100-(25/100+17/100)=?
у меня мало баллов..никто на вопрос не ответит(​
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