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