Rekensommen met eraf tot 20

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

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