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