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