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