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