Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
8 + 22 =
2
30
|
2.
17 + 24 =
41
2
|
3.
18 – 1 =
17
2
|
4.
24 – 17 =
7
1
|
|
5.
14 – 14 =
2
0
|
6.
23 + 17 =
2
40
|
7.
30 + 11 =
41
2
|
8.
31 + 17 =
48
2
|
|
9.
2 – 1 =
2
1
|
10.
49 + 1 =
2
50
|
11.
7 + 0 =
7
1
|
12.
39 – 3 =
36
2
|
|
13.
46 – 42 =
4
1
|
14.
45 + 1 =
2
46
|
15.
49 – 14 =
35
2
|
16.
48 + 2 =
2
50
|
|
17.
20 + 1 =
2
21
|
18.
50 – 1 =
2
49
|
19.
18 + 32 =
2
50
|
20.
9 – 7 =
1
2
|