Reken de erafsom tot 20 uit

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

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