Welk getal uit de tafel van 4 ontbreekt?
Tafels
1.
×
=
4
2
________
2.
×
=
4
5
________
3.
×
=
4
2
________
4.
×
=
4
5
________
5.
×
=
4
9
________
6.
×
=
4
4
________
7.
×
=
4
8
________
8.
×
=
4
7
________
9.
×
=
4
1
________
10.
×
=
4
2
________
11.
×
=
4
3
________
12.
×
=
4
1
________
13.
×
=
4
6
________
14.
×
=
4
7
________
15.
×
=
4
3
________
16.
×
=
4
9
________
17.
×
=
4
3
________
18.
×
=
4
2
________
19.
×
=
4
1
________
20.
×
=
4
6
________
21.
×
=
4
6
________
22.
×
=
4
5
________
23.
×
=
4
8
________
24.
×
=
4
5
________