Rekensommen met eraf tot 20

Erafsommen
1.
20
–
9
=
2.
6
–
6
=
3.
12
–
9
=
4.
16
–
9
=
5.
13
–
8
=
6.
10
–
0
=
7.
14
–
3
=
8.
2
–
2
=
9.
8
–
4
=
10.
3
–
2
=
11.
18
–
6
=
12.
5
–
4
=
13.
16
–
16
=
14.
20
–
10
=
15.
17
–
11
=
16.
19
–
14
=
17.
15
–
0
=
18.
12
–
4
=
19.
15
–
6
=
20.
17
–
17
=
21.
15
–
0
=
22.
12
–
8
=
23.
4
–
1
=
24.
3
–
1
=
25.
18
–
4
=
26.
1
–
0
=
27.
15
–
12
=
28.
10
–
1
=
29.
3
–
0
=
30.
9
–
7
=
31.
19
–
9
=
32.
10
–
4
=
33.
9
–
3
=
34.
11
–
5
=
35.
18
–
16
=
36.
1
–
1
=
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Rekensommen met eraf tot 20
| ANTWOORDEN

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