Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
42 + 583 =
2
625
|
2.
146 + 824 =
970
2
|
3.
397 + 228 =
625
2
|
4.
439 + 90 =
529
2
|
|
5.
62 – 21 =
41
2
|
6.
511 + 214 =
725
2
|
7.
78 – 61 =
17
2
|
8.
898 + 22 =
2
920
|
|
9.
32 + 493 =
2
525
|
10.
474 – 313 =
2
161
|
11.
940 – 203 =
737
2
|
12.
258 + 81 =
2
339
|
|
13.
625 + 276 =
2
901
|
14.
7 + 51 =
2
58
|
15.
782 + 52 =
834
2
|
16.
215 + 504 =
719
2
|
|
17.
846 + 103 =
2
949
|
18.
111 + 327 =
438
2
|
19.
474 – 460 =
1
14
|
20.
660 – 552 =
2
108
|