Reken de erafsom tot 20 uit

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

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