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