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