Completa la tabla

Completa la tabla

a	b	inverso a	inverso b	a+b	A-b	axb	a:b
3	1/4	1/3	4/1	13/4	11/4	3/4	12/1
2/5	-2	5/2	1/-2	1/2	12/5	-4/5	-1/5
3/8	1/7	8/3	7/1	29/3	13/56	3/56	21/8