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