Reken de erafsom tot 20 uit

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

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