Oefen de erafsommen tot 20

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

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