Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
458 – 231 =
227
2
|
2.
819 – 217 =
2
602
|
3.
426 + 0 =
426
2
|
4.
316 + 181 =
2
497
|
|
5.
84 + 623 =
2
707
|
6.
998 – 18 =
980
2
|
7.
540 – 137 =
2
403
|
8.
618 + 326 =
2
944
|
|
9.
11 – 5 =
6
1
|
10.
827 – 631 =
2
196
|
11.
671 + 163 =
834
2
|
12.
283 + 126 =
2
409
|
|
13.
606 – 580 =
26
2
|
14.
215 + 82 =
297
2
|
15.
557 – 452 =
2
105
|
16.
638 + 87 =
2
725
|
|
17.
119 + 383 =
502
2
|
18.
334 + 455 =
2
789
|
19.
829 + 27 =
856
2
|
20.
907 + 14 =
2
921
|