Completar el espacio en blanco para obtener fracciones equivalentes. a) 3
5
=
−21
b) 1
4
=
16
c) 8
=
−8
3
d)
15
=
−12
45
5
=
−21
b) 1
4
=
16
c) 8
=
−8
3
d)
15
=
−12
45
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