Reken de erafsom tot 20 uit

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

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