Reken de erafsom tot 20 uit

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

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