Rekensommen met eraf tot 20

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

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