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