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