Question

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Answer 1

Numitorul comun se află calculând c.m.m.m.c. al numerelor aflate la numitor.
a)10=2•5
12=2^2•3
6=2•3
c.m.m.m.c.=2^2•3•5=60
(6•3)/60; (5•5)/60; (5•10)/60 adică 18/60; 25/60; 50/60.
b) 2=1•2
3=1•3
5=1•5
30=2•3•5
c.m.m.m.c.=2•3•5=30
(1•15)/30; (2•10)/30; (3•6)/30; (7•1)/30 adică 15/30; 20/30; 18/30; 7/30.
c) 2=1•2
4=2^2
18=2•3^2
c.m.m.m.c.=2^2•3^2=36
(1•18)/36; (3•9)/36; (5•2)/36 adică 18/36; 27/36; 10/36.