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