Oefen de erafsommen tot 20

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

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