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