Reken de erafsom tot 20 uit

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

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