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