Oefen de erafsommen tot 20

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

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