Rekensommen met eraf tot 20

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

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