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