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