Rekensommen met eraf tot 20

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

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