σελ.12,13

1x2=2

2x2=4

3x2=6

4x2=8

5x2=10

6x2=12

7x2=14

8x2=16

9x2=18

10x2=20

0,2,4,6,8,10,12,14,16,18,20

Τι μας θυμίζει;

1

2

3

4

5

6

7

8

9

10

11

11

5

5

5

3

5

15

3

Χ

5=

15

15

5

5

5

5

5

5

5

5

+

5

+

5

=

15

5

+

5

+

5

+

5

+

5

=

25

25

5

Χ

5

=

25

25

5

5

5

5

ΒΑΣΩ

5

+

5

+

5

+

5

=

20

4

5

20

4

Χ

5

=

20

20

4

4

4

4

4

4

=

+

4

+

4

+

4

=

16

4

4

16

4

Χ

4

16

16

1

2

3

4

4

12

3Χ4=12