Oefen de erafsommen tot 20

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

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