Rekensommen met eraf tot 20

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

Rekensommen met eraf tot 20
| ANTWOORDEN

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