Oefen de erbijsom en erafsom tot 20
In de mix
|
1.
18 + 0 =
2
18
|
2.
12 + 7 =
2
19
|
3.
12 – 4 =
1
8
|
4.
13 + 5 =
18
2
|
|
5.
5 – 5 =
0
2
|
6.
5 + 0 =
1
5
|
7.
20 + 0 =
20
2
|
8.
8 – 3 =
1
5
|
|
9.
14 + 3 =
17
2
|
10.
1 + 14 =
15
1
|
11.
20 + 0 =
2
20
|
12.
12 + 6 =
18
2
|
|
13.
7 + 6 =
13
1
|
14.
1 – 1 =
0
2
|
15.
10 – 5 =
1
5
|
16.
19 – 2 =
2
17
|
|
17.
12 + 1 =
13
1
|
18.
3 + 3 =
1
6
|
19.
12 + 0 =
12
1
|
20.
20 + 0 =
2
20
|