Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
6 – 4 =
2
1
|
2.
19 – 17 =
1
2
|
3.
10 + 38 =
48
2
|
4.
28 + 17 =
2
45
|
|
5.
26 – 23 =
1
3
|
6.
32 + 18 =
50
2
|
7.
8 + 1 =
9
1
|
8.
18 + 17 =
35
2
|
|
9.
29 + 9 =
2
38
|
10.
26 + 11 =
37
2
|
11.
9 – 5 =
1
4
|
12.
33 – 0 =
33
2
|
|
13.
10 + 18 =
28
2
|
14.
45 + 5 =
2
50
|
15.
9 – 0 =
1
9
|
16.
30 + 14 =
2
44
|
|
17.
47 – 38 =
1
9
|
18.
49 – 17 =
2
32
|
19.
45 – 18 =
2
27
|
20.
13 – 10 =
1
3
|