Reken de erafsom tot 20 uit

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

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