Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
844 – 438 =
2
406
|
2.
567 + 397 =
964
2
|
3.
388 + 161 =
549
2
|
4.
418 – 296 =
122
2
|
|
5.
235 + 290 =
525
2
|
6.
72 + 436 =
2
508
|
7.
168 + 567 =
735
2
|
8.
542 – 243 =
2
299
|
|
9.
815 – 559 =
2
256
|
10.
421 + 396 =
2
817
|
11.
241 – 141 =
100
2
|
12.
701 + 224 =
925
2
|
|
13.
516 + 191 =
707
2
|
14.
714 – 622 =
2
92
|
15.
875 – 336 =
2
539
|
16.
2 + 532 =
534
2
|
|
17.
404 – 248 =
2
156
|
18.
673 + 70 =
2
743
|
19.
167 + 136 =
2
303
|
20.
677 + 257 =
934
2
|