Rekensommen met eraf tot 20

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

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