Rekensommen met eraf tot 20

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

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