Összeadás 2.
×
vissza
3. feladat megoldása
(+
3)
+
(–
3)
=
+
3
–
3
=
0
(–
4)
+
(–
2)
=
–
4
–
2
=
–
6
(–
3)
–
(–
2)
=
–
3
+
2
=
–
1
(–
6)
–
(+
7)
=
–
6
–
7
=
–
1
3
(+
3)
–
(+
7)
=
+
3
–
7
=
–
4
