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