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