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