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