Maak de erbijsom en erafsom tot 20
In de mix
|
1.
12 – 10 =
1
2
|
2.
1 – 1 =
0
2
|
3.
5 – 0 =
5
1
|
4.
10 – 5 =
5
1
|
|
5.
17 + 0 =
17
2
|
6.
4 – 1 =
1
3
|
7.
12 – 1 =
1
11
|
8.
3 + 0 =
1
3
|
|
9.
16 + 0 =
16
2
|
10.
17 – 3 =
14
1
|
11.
4 – 4 =
2
0
|
12.
7 + 1 =
8
1
|
|
13.
12 + 5 =
17
2
|
14.
8 + 0 =
1
8
|
15.
16 + 2 =
18
2
|
16.
8 – 7 =
2
1
|
|
17.
7 + 2 =
9
1
|
18.
9 – 6 =
1
3
|
19.
7 + 11 =
18
2
|
20.
16 + 2 =
18
2
|