Rekensommen met eraf tot 20

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

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