Oefen de erafsommen tot 20

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

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