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