5/7+3/14+1/21=? подробно
5/7+3/14+1/21= (5/7)*6+(3/14)*3+(1/21)*2=
30/42+9/42+2/42= (30+9+2)/42= 41/42
вот как то так))
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5/7+3/14+1/21= (5/7)*6+(3/14)*3+(1/21)*2=
30/42+9/42+2/42= (30+9+2)/42= 41/42
вот как то так))