Oefen de erbijsommen tot 20
Erbijsommen
|
1.
13 + 2 =
6
4
10
15
|
2.
6 + 4 =
4
10
14
7
|
3.
12 + 0 =
12
17
5
3
|
4.
14 + 6 =
3
6
8
20
|
|
5.
12 + 6 =
2
18
4
5
|
6.
16 + 4 =
5
8
20
13
|
7.
6 + 8 =
18
3
14
1
|
8.
20 + 0 =
4
6
20
8
|
|
9.
13 + 3 =
6
9
3
16
|
10.
14 + 6 =
2
13
20
6
|
11.
15 + 1 =
8
2
16
4
|
12.
2 + 8 =
9
10
11
7
|
|
13.
12 + 6 =
1
18
4
6
|
14.
15 + 2 =
5
17
7
2
|
15.
1 + 6 =
2
7
11
10
|
16.
13 + 0 =
16
15
13
11
|
|
17.
5 + 14 =
2
1
3
19
|
18.
14 + 6 =
2
20
10
8
|
19.
12 + 6 =
9
11
1
18
|
20.
7 + 9 =
10
1
16
6
|