Rekensommen met eraf tot 20

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

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