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