Oefen de erafsommen tot 20

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

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