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