Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
880 + 24 =
2
904
|
2.
670 + 84 =
2
754
|
3.
435 + 6 =
441
2
|
4.
114 – 2 =
2
112
|
|
5.
288 + 251 =
2
539
|
6.
153 – 127 =
26
2
|
7.
232 – 78 =
154
2
|
8.
709 – 335 =
2
374
|
|
9.
475 + 455 =
2
930
|
10.
636 + 349 =
2
985
|
11.
475 – 279 =
196
2
|
12.
587 + 49 =
636
2
|
|
13.
399 + 339 =
738
2
|
14.
239 + 287 =
526
2
|
15.
270 – 233 =
37
2
|
16.
885 + 61 =
2
946
|
|
17.
896 – 230 =
2
666
|
18.
833 + 70 =
903
2
|
19.
717 + 111 =
828
2
|
20.
613 + 344 =
957
2
|