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