Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
792 + 41 =
833
2
|
2.
402 – 389 =
1
13
|
3.
456 + 204 =
2
660
|
4.
121 – 118 =
3
1
|
|
5.
503 + 369 =
872
2
|
6.
651 – 145 =
2
506
|
7.
739 – 433 =
306
2
|
8.
918 + 59 =
977
2
|
|
9.
624 + 365 =
989
2
|
10.
234 – 127 =
2
107
|
11.
259 – 251 =
1
8
|
12.
374 – 17 =
2
357
|
|
13.
886 + 104 =
990
2
|
14.
507 – 211 =
2
296
|
15.
583 + 235 =
818
2
|
16.
544 – 260 =
284
2
|
|
17.
514 + 203 =
717
2
|
18.
16 + 569 =
585
2
|
19.
303 + 358 =
661
2
|
20.
478 + 418 =
896
2
|