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