Oefen de erafsommen tot 20

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

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