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