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