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