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