Reken de erafsom tot 20 uit

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

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