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