Rekensommen met eraf tot 20

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

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