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