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