Összeadás 3.                                                                       ×vissza

4. feladat megoldása

	5	0	–	3	0	–	8	0	–	3	0	=	5	0	–	1	4	0	=	9	0
1	0	0	+	2	0	+	1	0	–	6	0	=	1	3	0	–	6	0	=	7	0
	4	0	+	3	0	–	5	0	–	4	0	=	3	0	–	5	0	=	–	5	0
–	6	0	+	1	0	–	5	0	+	4	0	=	–	6	0
	1	0	–	4	0	+	5	0	–	7	0	=	6	0	–	1	1	0	=	5	0