Oefen de erafsommen tot 20

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

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