Oefen de erafsommen tot 20

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

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