Reken de erafsom tot 20 uit

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

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