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