Hola! :3
Resolvemos:
1) 3/5+1/15=a
9/15+1/15=a
10/15=a
2/3=a
2) 1/9+5/3=b
1/9+15/9=b
16/9=b
3) 5/4-1/2=c
5/4-2/4=c
3/4=c
Espero haberte ayudado :D
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Verified answer
Hola! :3
Resolvemos:
1) 3/5+1/15=a
9/15+1/15=a
10/15=a
2/3=a
2) 1/9+5/3=b
1/9+15/9=b
16/9=b
3) 5/4-1/2=c
5/4-2/4=c
3/4=c
Espero haberte ayudado :D