Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
713 – 598 =
2
115
|
2.
281 – 29 =
252
2
|
3.
957 + 27 =
984
2
|
4.
504 – 456 =
2
48
|
|
5.
190 + 584 =
2
774
|
6.
718 + 48 =
766
2
|
7.
465 + 325 =
790
2
|
8.
64 + 117 =
181
2
|
|
9.
457 – 81 =
2
376
|
10.
500 – 30 =
470
2
|
11.
421 + 28 =
2
449
|
12.
107 + 268 =
375
2
|
|
13.
707 + 229 =
936
2
|
14.
468 + 396 =
2
864
|
15.
119 + 616 =
2
735
|
16.
532 – 154 =
2
378
|
|
17.
138 + 551 =
689
2
|
18.
702 + 241 =
2
943
|
19.
562 + 388 =
2
950
|
20.
639 + 81 =
2
720
|