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