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