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