Oefen de erafsommen tot 20

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

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