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