Rekensommen met eraf tot 20

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

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