Верно ли равенство?Ответ обоснуйте.
a) 1/2*1/3=1/3*1/2
b) 1/4*2/3*3/7=3/7*1/4*2/3
в) 2/3*(1/5+3/4)=2/3*1/5+2/3*3/4
г) (1/2+1/4)*8=1/2*8+1/4*8
Зарание спасибо :3
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