Erafsommen oplossen tot 20

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

Erafsommen oplossen tot 20
| ANTWOORDEN

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