Oefen de erafsommen tot 20

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

Oefen de erafsommen tot 20
| ANTWOORDEN

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