Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
49 + 1 =
2
50
|
2.
34 – 32 =
1
2
|
3.
40 + 0 =
40
2
|
4.
28 – 25 =
3
1
|
|
5.
3 – 2 =
2
1
|
6.
2 + 39 =
2
41
|
7.
7 – 6 =
2
1
|
8.
5 + 16 =
21
2
|
|
9.
45 + 1 =
46
2
|
10.
45 + 4 =
2
49
|
11.
15 – 11 =
1
4
|
12.
18 + 1 =
19
2
|
|
13.
49 – 49 =
2
0
|
14.
45 – 32 =
13
1
|
15.
5 + 14 =
2
19
|
16.
20 – 18 =
1
2
|
|
17.
5 + 4 =
9
1
|
18.
35 – 0 =
35
2
|
19.
38 – 8 =
2
30
|
20.
48 – 37 =
1
11
|