Reken de erafsom tot 20 uit

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

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