Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
915 + 16 =
931
2
|
2.
142 – 139 =
3
1
|
3.
638 – 101 =
537
2
|
4.
105 + 746 =
2
851
|
|
5.
442 – 245 =
197
2
|
6.
808 – 762 =
2
46
|
7.
562 + 283 =
2
845
|
8.
316 – 303 =
1
13
|
|
9.
348 + 549 =
2
897
|
10.
748 + 42 =
790
2
|
11.
925 – 746 =
179
2
|
12.
638 + 117 =
755
2
|
|
13.
399 + 116 =
2
515
|
14.
189 – 139 =
50
2
|
15.
398 + 58 =
456
2
|
16.
814 – 389 =
2
425
|
|
17.
471 + 168 =
2
639
|
18.
770 – 686 =
84
2
|
19.
360 + 341 =
701
2
|
20.
280 + 474 =
754
2
|