Oefen de erafsommen tot 20

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

Oefen de erafsommen tot 20
| ANTWOORDEN

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