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