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