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