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