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