Oefen de erafsommen tot 20

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

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