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