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