Oefen de erafsommen tot 20

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

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