Reken de erafsom tot 20 uit

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

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