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