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