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