Oefen de erafsommen tot 20

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

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