Oefen de erbijsom en erafsom tot 100
In de mix
|
1.
20 + 20 =
40
2
|
2.
78 – 34 =
44
2
|
3.
4 – 1 =
3
1
|
4.
99 + 1 =
2
100
|
|
5.
89 + 10 =
99
2
|
6.
15 – 11 =
4
1
|
7.
11 – 4 =
1
7
|
8.
47 – 32 =
1
15
|
|
9.
6 + 41 =
2
47
|
10.
58 – 18 =
2
40
|
11.
19 – 13 =
1
6
|
12.
4 – 2 =
1
2
|
|
13.
84 + 0 =
84
2
|
14.
54 + 29 =
83
2
|
15.
48 + 10 =
58
2
|
16.
79 + 0 =
79
2
|
|
17.
88 + 4 =
2
92
|
18.
68 – 14 =
54
2
|
19.
19 – 16 =
1
3
|
20.
13 + 33 =
46
2
|