Rekensommen met eraf tot 20

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

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