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