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