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