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