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