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