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