Oefen de erafsommen tot 20

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

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