Összeadás 3.                                                                       ×vissza

1. feladat megoldása                                                                                                           

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