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