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