Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
211 + 286 =
2
497
|
2.
508 + 279 =
787
2
|
3.
641 + 253 =
2
894
|
4.
978 – 655 =
2
323
|
|
5.
939 + 30 =
969
2
|
6.
210 + 724 =
2
934
|
7.
572 – 16 =
556
2
|
8.
831 – 586 =
245
2
|
|
9.
74 + 374 =
2
448
|
10.
738 – 154 =
584
2
|
11.
979 – 253 =
726
2
|
12.
870 + 112 =
982
2
|
|
13.
911 – 639 =
272
2
|
14.
932 – 624 =
308
2
|
15.
514 – 414 =
100
2
|
16.
724 + 5 =
729
2
|
|
17.
194 + 451 =
2
645
|
18.
382 + 10 =
392
2
|
19.
434 + 484 =
918
2
|
20.
142 + 291 =
2
433
|