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