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