Reken de erafsom tot 20 uit

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

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