Rekensommen met eraf tot 20

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

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