Oefen de erafsommen tot 20

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

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