Oefen de erafsommen tot 20

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

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