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