Oefen de erafsommen tot 20

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

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