Rekensommen met eraf tot 20

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

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