Reken de erafsom tot 20 uit

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

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