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