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