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