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