Rekensommen met eraf tot 20

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

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