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