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