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