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