Oefen de erafsommen tot 20

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

Oefen de erafsommen tot 20
| ANTWOORDEN

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