Oefen de erbijsom en erafsom tot 50
In de mix
|
1.
45 – 41 =
1
4
|
2.
27 – 24 =
3
1
|
3.
1 – 1 =
2
0
|
4.
20 + 24 =
2
44
|
|
5.
25 + 14 =
39
2
|
6.
20 – 19 =
2
1
|
7.
13 + 13 =
2
26
|
8.
12 – 12 =
2
0
|
|
9.
24 + 8 =
2
32
|
10.
8 + 29 =
37
2
|
11.
9 – 2 =
7
1
|
12.
27 + 5 =
2
32
|
|
13.
9 + 7 =
2
16
|
14.
24 – 5 =
2
19
|
15.
42 + 1 =
2
43
|
16.
49 + 0 =
2
49
|
|
17.
46 – 39 =
7
1
|
18.
28 + 0 =
28
2
|
19.
22 + 18 =
40
2
|
20.
37 + 1 =
2
38
|