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