Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
1 + 325 =
326
2
|
2.
373 + 367 =
740
2
|
3.
993 – 970 =
2
23
|
4.
532 – 238 =
2
294
|
|
5.
474 – 61 =
2
413
|
6.
405 + 564 =
969
2
|
7.
427 + 358 =
2
785
|
8.
889 + 29 =
918
2
|
|
9.
436 + 488 =
2
924
|
10.
577 + 417 =
994
2
|
11.
924 + 52 =
2
976
|
12.
401 + 222 =
623
2
|
|
13.
76 + 509 =
585
2
|
14.
50 – 11 =
2
39
|
15.
192 – 30 =
2
162
|
16.
255 – 97 =
2
158
|
|
17.
809 – 295 =
2
514
|
18.
664 – 499 =
2
165
|
19.
840 + 5 =
2
845
|
20.
839 – 384 =
455
2
|