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