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