Oefen de erafsommen tot 20

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

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