Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
285 + 363 =
648
2
|
2.
550 – 471 =
2
79
|
3.
477 – 443 =
2
34
|
4.
46 – 25 =
2
21
|
|
5.
742 – 128 =
2
614
|
6.
678 + 31 =
2
709
|
7.
910 – 766 =
2
144
|
8.
654 – 414 =
240
2
|
|
9.
483 – 26 =
2
457
|
10.
731 – 485 =
246
2
|
11.
914 – 595 =
2
319
|
12.
543 – 497 =
2
46
|
|
13.
239 + 635 =
2
874
|
14.
210 – 189 =
2
21
|
15.
807 + 76 =
2
883
|
16.
476 + 478 =
954
2
|
|
17.
705 – 441 =
264
2
|
18.
667 + 50 =
2
717
|
19.
927 – 359 =
568
2
|
20.
111 + 887 =
2
998
|