Rekensommen met eraf tot 20

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

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