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