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a fost răspuns

Completati tabelul : a=3/24,b=7/36,c=5/72. Rezolvati : a+b,b+c,(a+b)+c,a+(b+c).

Răspuns :

S1m
a+b=3/24+7/36=3/3•2•2•2. +7/3•2•2•3=
3•3/3•2•2•2•3+7•2/3•2•2•2•3=
9+14/3•2•2•2•3=23/72

b+c=7/36 +5/72=19/72

(a+b)+c=23/72+5/72=28/72

a+(b+c)=3/24+19/72= 28/72

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