15 = 3 · 5; 12 = 2² · 3; НОК = 2² · 3 · 5 = 60
60 : 15 = 4 - доп. множ. к 8/15 = 32/60
60 : 12 = 5 - доп. множ. к 5/12 = 25/60
7) 2 8/15 и 1 5/12 = 2 32/60 и 1 25/60.
18 = 2 · 3²; 15 = 3 · 5; НОК = 2 · 3² · 5 = 90
90 : 18 = 5 - доп. множ. к 1/18 = 5/90
90 : 15 = 6 - доп. множ. к 4/15 = 24/90
8) 3 1/18 и 2 4/15 = 3 5/90 и 2 24/90.
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15 = 3 · 5; 12 = 2² · 3; НОК = 2² · 3 · 5 = 60
60 : 15 = 4 - доп. множ. к 8/15 = 32/60
60 : 12 = 5 - доп. множ. к 5/12 = 25/60
7) 2 8/15 и 1 5/12 = 2 32/60 и 1 25/60.
18 = 2 · 3²; 15 = 3 · 5; НОК = 2 · 3² · 5 = 90
90 : 18 = 5 - доп. множ. к 1/18 = 5/90
90 : 15 = 6 - доп. множ. к 4/15 = 24/90
8) 3 1/18 и 2 4/15 = 3 5/90 и 2 24/90.