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