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