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