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