Reken de erafsom tot 20 uit

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

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