Oefen de erafsommen tot 20

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

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