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