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