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