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