Rekensommen met eraf tot 20

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

Rekensommen met eraf tot 20
| ANTWOORDEN

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