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