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