Oefen de erafsommen tot 20

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

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