Reken de erafsom tot 20 uit

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

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