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