Rekensommen met eraf tot 20

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

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