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