Rekensommen met eraf tot 20

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

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