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