Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
511 + 308 =
2
819
|
2.
870 + 79 =
949
2
|
3.
475 + 343 =
2
818
|
4.
704 + 204 =
908
2
|
|
5.
382 – 5 =
377
2
|
6.
177 + 239 =
2
416
|
7.
646 – 228 =
2
418
|
8.
426 – 106 =
320
2
|
|
9.
563 – 423 =
140
2
|
10.
842 + 134 =
976
2
|
11.
526 – 505 =
2
21
|
12.
602 – 449 =
2
153
|
|
13.
60 + 757 =
817
2
|
14.
267 + 288 =
2
555
|
15.
99 + 344 =
2
443
|
16.
499 + 327 =
826
2
|
|
17.
42 – 7 =
35
2
|
18.
885 – 639 =
246
2
|
19.
887 + 1 =
888
2
|
20.
27 – 16 =
1
11
|