Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
295 – 257 =
2
38
|
2.
661 + 289 =
950
2
|
3.
353 – 85 =
2
268
|
4.
251 + 186 =
2
437
|
|
5.
759 + 72 =
2
831
|
6.
3 + 254 =
257
2
|
7.
830 – 450 =
380
2
|
8.
917 + 9 =
926
2
|
|
9.
890 + 90 =
2
980
|
10.
729 + 122 =
851
2
|
11.
326 + 483 =
809
2
|
12.
258 – 221 =
2
37
|
|
13.
376 + 23 =
2
399
|
14.
715 – 283 =
432
2
|
15.
882 – 298 =
584
2
|
16.
719 + 71 =
790
2
|
|
17.
934 – 22 =
912
2
|
18.
800 – 144 =
656
2
|
19.
257 – 214 =
43
2
|
20.
557 + 389 =
2
946
|