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