Reken de erafsom tot 20 uit

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

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