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