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