Reken de erafsom tot 20 uit

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

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