Rekensommen met eraf tot 20

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

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