Oefen de erafsommen tot 20

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

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