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