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