Oefen de erbijsom en erafsom tot 1.000
In de mix
|
1.
810 + 140 =
2
950
|
2.
243 – 119 =
124
2
|
3.
571 – 142 =
429
2
|
4.
949 + 24 =
2
973
|
|
5.
507 – 49 =
2
458
|
6.
972 – 390 =
582
2
|
7.
838 – 176 =
2
662
|
8.
654 – 497 =
2
157
|
|
9.
719 – 314 =
2
405
|
10.
649 + 150 =
799
2
|
11.
627 + 111 =
2
738
|
12.
621 + 254 =
2
875
|
|
13.
307 + 82 =
389
2
|
14.
899 – 323 =
576
2
|
15.
694 + 22 =
716
2
|
16.
146 – 96 =
50
2
|
|
17.
424 + 534 =
2
958
|
18.
258 – 160 =
98
2
|
19.
269 + 195 =
464
2
|
20.
995 – 61 =
934
2
|