Oefen de erafsommen tot 20

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

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