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