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