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