Rekensommen met eraf tot 20

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

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