а:6 3/4
Р=? Р■=а*4
Р=6 3/4*4=10 3/4
Ответ:Р=10 3/4
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а:6 3/4
Р=? Р■=а*4
Р=6 3/4*4=10 3/4
Ответ:Р=10 3/4