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