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