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