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