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