Rekensommen met eraf tot 20

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

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