Rekensommen met eraf tot 20

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

Rekensommen met eraf tot 20
| ANTWOORDEN

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