Oefen de erafsommen tot 20

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

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