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