Oefen de erafsommen tot 20

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

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