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