Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
480 – 212 =
268
2
|
2.
634 – 170 =
464
2
|
3.
864 + 29 =
2
893
|
4.
509 – 333 =
176
2
|
|
5.
827 – 275 =
552
2
|
6.
187 – 59 =
2
128
|
7.
484 – 216 =
268
2
|
8.
850 – 462 =
388
2
|
|
9.
79 + 61 =
2
140
|
10.
756 + 148 =
904
2
|
11.
696 – 398 =
2
298
|
12.
961 – 405 =
2
556
|
|
13.
194 + 7 =
201
2
|
14.
166 + 264 =
2
430
|
15.
137 + 219 =
356
2
|
16.
796 + 28 =
2
824
|
|
17.
906 + 46 =
952
2
|
18.
693 – 355 =
2
338
|
19.
719 – 139 =
580
2
|
20.
711 – 527 =
184
2
|