Oefen de erafsommen tot 20

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

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