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