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