Reken de erafsom tot 20 uit

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

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