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