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