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