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