Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
33 + 6 =
2
39
|
2.
38 – 14 =
2
24
|
3.
31 + 9 =
40
2
|
4.
32 + 13 =
45
2
|
|
5.
3 – 3 =
0
2
|
6.
18 – 11 =
7
1
|
7.
10 + 4 =
1
14
|
8.
49 + 0 =
49
2
|
|
9.
5 – 0 =
5
1
|
10.
50 – 12 =
38
2
|
11.
15 – 12 =
3
1
|
12.
29 – 10 =
2
19
|
|
13.
20 – 8 =
1
12
|
14.
3 + 18 =
2
21
|
15.
1 + 9 =
1
10
|
16.
2 + 7 =
1
9
|
|
17.
1 – 1 =
2
0
|
18.
23 + 21 =
2
44
|
19.
9 + 26 =
35
2
|
20.
2 – 1 =
1
2
|