Oefen de erafsommen tot 20

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

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