Összeadás 2.                                                                       ×vissza

1. feladat megoldása

(–

2)

+

(–

3)

=

–

2

–

3

=

–

5

(+

5)

–

(+

2)

=

+

5

–

2

=

+

3

(–

4)

+

(+

5)

=

–

4

+

5

=

+

1

(–

6)

–

(–

9)

=

–

6

+

9

=

+

3

(+

1)

+

(–

5)

=

+

1

–

5

=

–

4