Oefen de erafsommen tot 20

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

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