Oefen de erafsommen tot 20

Erafsommen
1.
12
–
9
=
2.
11
–
6
=
3.
5
–
0
=
4.
18
–
14
=
5.
8
–
4
=
6.
3
–
0
=
7.
7
–
6
=
8.
2
–
2
=
9.
1
–
1
=
10.
20
–
5
=
11.
19
–
8
=
12.
1
–
1
=
13.
5
–
4
=
14.
4
–
0
=
15.
13
–
11
=
16.
10
–
9
=
17.
18
–
8
=
18.
3
–
3
=
19.
14
–
5
=
20.
10
–
4
=
21.
5
–
5
=
22.
8
–
0
=
23.
1
–
1
=
24.
16
–
13
=
25.
5
–
3
=
26.
7
–
2
=
27.
14
–
1
=
28.
10
–
8
=
29.
4
–
2
=
30.
1
–
0
=
31.
3
–
0
=
32.
11
–
6
=
33.
14
–
12
=
34.
1
–
0
=
35.
16
–
10
=
36.
9
–
6
=
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Oefen de erafsommen tot 20
| ANTWOORDEN

Erafsommen
1.
12
–
9
=
3
2.
11
–
6
=
5
3.
5
–
0
=
5
4.
18
–
14
=
4
5.
8
–
4
=
4
6.
3
–
0
=
3
7.
7
–
6
=
1
8.
2
–
2
=
0
9.
1
–
1
=
0
10.
20
–
5
=
15
11.
19
–
8
=
11
12.
1
–
1
=
0
13.
5
–
4
=
1
14.
4
–
0
=
4
15.
13
–
11
=
2
16.
10
–
9
=
1
17.
18
–
8
=
10
18.
3
–
3
=
0
19.
14
–
5
=
9
20.
10
–
4
=
6
21.
5
–
5
=
0
22.
8
–
0
=
8
23.
1
–
1
=
0
24.
16
–
13
=
3
25.
5
–
3
=
2
26.
7
–
2
=
5
27.
14
–
1
=
13
28.
10
–
8
=
2
29.
4
–
2
=
2
30.
1
–
0
=
1
31.
3
–
0
=
3
32.
11
–
6
=
5
33.
14
–
12
=
2
34.
1
–
0
=
1
35.
16
–
10
=
6
36.
9
–
6
=
3
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Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen