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