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