Rekensommen met eraf tot 20

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

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