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