Oefen de erafsommen tot 20

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

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