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