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