Oefen de erafsommen tot 20

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

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