Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
2 – 2 =
2
0
|
2.
3 + 39 =
2
42
|
3.
50 – 40 =
1
10
|
4.
22 + 5 =
27
2
|
|
5.
22 – 4 =
2
18
|
6.
43 – 6 =
37
2
|
7.
33 – 5 =
28
2
|
8.
45 + 0 =
45
2
|
|
9.
32 – 10 =
2
22
|
10.
25 – 22 =
1
3
|
11.
47 + 2 =
49
2
|
12.
4 – 1 =
1
3
|
|
13.
40 + 0 =
40
2
|
14.
4 – 1 =
1
3
|
15.
36 – 19 =
17
2
|
16.
41 + 0 =
2
41
|
|
17.
15 – 8 =
7
1
|
18.
40 + 6 =
2
46
|
19.
33 + 8 =
2
41
|
20.
28 + 15 =
43
2
|