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