Összeadás 2.                                                                       ×vissza

3. feladat megoldása                                                                                                      tovább          megoldás

(+

3)

+

(–

3)

=

(–

4)

+

(–

2)

=

(–

3)

–

(–

2)

=

(–

6)

–

(+

7)

=

(+

3)

–

(+

7)

=