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